NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
62 reportsClear category filter70,000 miles · Apr 9, 2009
Engine And Engine Cooling
FIRST OF ALL I LEARNED ON THE INTERNET THAT THE CHEVY AVEO IS NOT A GOOD DEAL WHEN YOU ARE LOOKING FOR A CAR. THE FIRST TIME THE TIMING BELT BROKE AND SPEND A LOT OF MONEY AND NOW THE THERMOSTAT HOUSING BROKE BECAUSE IS MADE OF PLASTIC. LIKE OTHER AVEO OWNERS SAY, THIS CAR HAVE TO BE RECALL, BECAUSE ALL THE PROBLEMS IT HAVE. *TR…
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FIRST OF ALL I LEARNED ON THE INTERNET THAT THE CHEVY AVEO IS NOT A GOOD DEAL WHEN YOU ARE LOOKING FOR A CAR. THE FIRST TIME THE TIMING BELT BROKE AND SPEND A LOT OF MONEY AND NOW THE THERMOSTAT HOUSING BROKE BECAUSE IS MADE OF PLASTIC. LIKE OTHER AVEO OWNERS SAY, THIS CAR HAVE TO BE RECALL, BECAUSE ALL THE PROBLEMS IT HAVE. *TR
NHTSA ODI #10264805
70,000 miles · Apr 5, 2009
Engine And Engine Cooling
I WAS DRIVING MY 2004 CHEVY AVEO (WITH 70K MILES) AND WITHOUT ANY WARNING THE ENGINE STARTING MAKING A LOT OF NOISE. I WAS ABOUT A BLOCK FROM HOME, AND WHEN I PULLED IN, SMOKE STARTED POURING OUT OF MY ENGINE. THE THERMOSTAT HOUSING HAD BUSTED WHICH IS APPARENTLY A VERY COMMON COMPLAIN WITH THIS CAR, AND THE MANUFACTURERS ARE …
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I WAS DRIVING MY 2004 CHEVY AVEO (WITH 70K MILES) AND WITHOUT ANY WARNING THE ENGINE STARTING MAKING A LOT OF NOISE. I WAS ABOUT A BLOCK FROM HOME, AND WHEN I PULLED IN, SMOKE STARTED POURING OUT OF MY ENGINE. THE THERMOSTAT HOUSING HAD BUSTED WHICH IS APPARENTLY A VERY COMMON COMPLAIN WITH THIS CAR, AND THE MANUFACTURERS ARE CLEARLY AWARE OF THE ISSUE SINCE THEY HAVE MADE THE REPLACEMENT PART OUT OF METAL. I DON'T KNOW YET WHAT KIND OF DAMAGE THE ENGINE HAS SUSTAINED. *TR
NHTSA ODI #10264174
54,000 miles · Mar 21, 2009
Engine And Engine Cooling
I WAS DRIVING DOWN THE ROAD AND SMELT BURNING FLUID AND THOUGHT IT WAS ANOTHER CAR ON THE ROAD. AFTER THE CAR WASN'T CLOSE TO ME ANYMORE I SMELT THE SAME ODOR. I LOOKED DOWN AT MY THERMOSTAT TO SEE MY CAR WAS IN THE RED, NO CHECK ENGINE LIGHT HAD COME ON OR ANYTHING. I PULLED OVER AND NOTICED IMMEDIATELY THAT MY THERMOSTAT HOUS…
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I WAS DRIVING DOWN THE ROAD AND SMELT BURNING FLUID AND THOUGHT IT WAS ANOTHER CAR ON THE ROAD. AFTER THE CAR WASN'T CLOSE TO ME ANYMORE I SMELT THE SAME ODOR. I LOOKED DOWN AT MY THERMOSTAT TO SEE MY CAR WAS IN THE RED, NO CHECK ENGINE LIGHT HAD COME ON OR ANYTHING. I PULLED OVER AND NOTICED IMMEDIATELY THAT MY THERMOSTAT HOUSING(WHICH IS PLASTIC AND A POOR DESIGN) HAD CRACKED IN HALF RIGHT ALONG THE SEAM.I HAVE READ THAT THIS PROBLEM HAS LEAD TO VERY EXPENSIVE REPAIRS DUE TO THE FACT THAT IT WARPS THE HEADS RIGHT AWAY AND IT CAN BE EASILY PREVENTED BY A BETTER QUALITY PART AND / OR DESIGN.THIS COULD HAVE BEEN A VERY DANGEROUS PROBLEM IF I HAD BEEN GOING DOWN A HILL, FAR FROM A PARKING SPOT, ON THE FREEWAY ETC. DO SOMETHING ABOUT IT. *TR
NHTSA ODI #10262618
53,470 miles · Dec 21, 2008
Engine And Engine Cooling
2004 CHEVROLET AVEO BROKE TIMING BELT AT 53,470 MILES. ALWAYS SERVICED ON TIME. NO WARNING LIGHTS. ALSO, HAVE HAD ELECTRICAL PROBLEMS WITH CAR SINCE BUYING. DASHBOARD CLOCK RESETS CONSTANTLY. ODOMETER READING FAILS. THIS IS A DANGEROUS CAR. *TR
NHTSA ODI #10252384
20,100 miles · Nov 12, 2008
Engine And Engine Cooling
MY CAR IS A 2004, CHEVY AVEO, WITH 23,100 MILES. THE TEMPERATURE GAGE SHOWED THE ENGINE TO BE OVERHEATING ON MY WAY TO WORK ON OCTOBER 29, 2008. THERE WERE NO WARNING LIGHTS, ONLY A RAMBLING ENGINE SOUND AND A BURNING TYPE OF SMELL. THE RESERVOIR TANK WAS HALF EMPTY AND THERE WAS VISIBLE SIGNS OF LEAKAGE AROUND THE THERMOST…
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MY CAR IS A 2004, CHEVY AVEO, WITH 23,100 MILES. THE TEMPERATURE GAGE SHOWED THE ENGINE TO BE OVERHEATING ON MY WAY TO WORK ON OCTOBER 29, 2008. THERE WERE NO WARNING LIGHTS, ONLY A RAMBLING ENGINE SOUND AND A BURNING TYPE OF SMELL. THE RESERVOIR TANK WAS HALF EMPTY AND THERE WAS VISIBLE SIGNS OF LEAKAGE AROUND THE THERMOSTAT HOUSING. THE REPLACEMENT OF THE THERMOSTAT HOUSING REMEDIED THE FAILURE. HOWEVER, THE THERMOSTAT HOUSING FROM THE FACTORY IS ORIGINALLY ENCASED IN PLASTIC HOUSING, BUT THE CHEVY DEALER RETAILS THE PART WITH METAL HOUSING. THE METAL HOUSING INDICATES CHEVY'S AWARENESS, YET THERE IS NO EXISTENCE OF COVERAGE ON THE WARRANTY OR ANY ISSUING OF RECALL OF THE PART. *TR
NHTSA ODI #10248634
61,000 miles · Oct 13, 2008
Electrical SystemEngine And Engine CoolingWheels
WE HAVE A 2004 AVEO AND NO LIGHT CAME ON AND AT 61,000 MILES MY CAR JUST QUIT RUNNING IN THE MIDDLE OF THE ROAD AND HAD TO BE TOWED TO THE DEALERSHIP THE TIMING BELT HAD BROKEN AND THE MOTOR WAS MESSED UP ALSO. I HAD TO PAY OVER $3,000 TO HAVE IT REPAIRED CAUSE A BELT BROKE. IT MESSED UP HALF OF THE MOTOR AND HAD TO BE REPLACED.…
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WE HAVE A 2004 AVEO AND NO LIGHT CAME ON AND AT 61,000 MILES MY CAR JUST QUIT RUNNING IN THE MIDDLE OF THE ROAD AND HAD TO BE TOWED TO THE DEALERSHIP THE TIMING BELT HAD BROKEN AND THE MOTOR WAS MESSED UP ALSO. I HAD TO PAY OVER $3,000 TO HAVE IT REPAIRED CAUSE A BELT BROKE. IT MESSED UP HALF OF THE MOTOR AND HAD TO BE REPLACED. THEN A MONTH LATER THE LIGHTS ON THE DASH QUIT WORKING AND THEY TOLD ME THAT THEY HAVE REPLACED THEM ALOT FOR THESE CARS AND THE WIRE HARNESS IS $1,200 DOLLARS AND I AM PAYING MORE FOR THE REPAIRS THEN I HAVE FOR THE CAR. THE CLOCK LIGHT HAS NEVER WORKED RIGHT SINCE WE GOT THE CAR. SO BE CAREFUL AND REPLACE YOUR TIMING BELT EARLY AND DON'T HAVE TO PAY ALL THAT MONEY LIKE WE HAD TO. I WISH I HAVE NEVER BOUGHT THE CAR NOW. *TR
NHTSA ODI #10245232
Mileage unknown · Sep 23, 2008
Engine And Engine Cooling
WE PURCHASED A PREOWNED CHEVROLET AVEO WITHIN APROX A YEAR (LOW MILEAGE STILL UNDER WARRANTY, ALSO PURCHASED EXTENDED WARRANTY & GAP INSURANCE), TAKEN VERY GOOD CARE OF IT, INCLUDING ROUTINE SERVICES AS NEEDED. SUDDENLY 3 WEEKS AGO WITHOUT ANY WARNING AT ALL THE ENGINE BLEW.. NO STEAM, NO GAGE WARNING, NO WARNING LIGHTS, NOTHI…
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WE PURCHASED A PREOWNED CHEVROLET AVEO WITHIN APROX A YEAR (LOW MILEAGE STILL UNDER WARRANTY, ALSO PURCHASED EXTENDED WARRANTY & GAP INSURANCE), TAKEN VERY GOOD CARE OF IT, INCLUDING ROUTINE SERVICES AS NEEDED. SUDDENLY 3 WEEKS AGO WITHOUT ANY WARNING AT ALL THE ENGINE BLEW.. NO STEAM, NO GAGE WARNING, NO WARNING LIGHTS, NOTHING. SUDDENLY THE ENGINE LIGHT CAME ON & WITHIN LESS THAN 30 SECONDS ENGINE BLEW WHILE DRIVING WITH NO WARNING. WE HAD IT TOWED TO A MECHANIC WHO DETERMINED THAT THE THERMOSTAT HAD WENT BAD CAUSING THE ENGINE TO BLOW. WE DECIDED TO HAVE IT TOWED TO THE DEALERSHIP IN ORDER TO PROCESS OUR WARRANTY AND POSSIBLY TRADE IT IN.. THE SERVICE DEPT AT THE DEALERSHIP STATES THAT WITHOUT TAKING APART THE MOTOR ALL THEY CAN TRULY SAY IS THE CAR GOT HOT AND THE ENGINE BLEW. ONCE AGAIN, I STRESS- NO STEAM, NO RAISED TEMP IN GAUGES OR CHECK LIGHTS CAME ON. WE HAD NO WARNING OR NOTICE OF ANY PROBLEMS WITH THE CAR. AFTER 3 WEEKS THE CAR IS STILL SITTING UNUSABLE AT THE DEALERSHIP SERVICE DEPT UNTIL WE DECIDE WHAT WE ARE GOING TO DO, AS WE WAIT ON HAVING MORE DIAGNOSTIC WORK DONE TO FILE WITH THE WARRANTY. WE DECIDED TO DO SOME RESEARCH ON THE CAR AND FOUND HUNDREDS OF COMPLAINTS IDENTICAL WORD FOR WORD ON WHAT HAPPENED TO US- ALL STEMMING FROM THERMOSTAT AND ENGINES RANDOMLY BLOWING UP WITHOUT WARRANTY. WE HAVE PRINTED ALL OF THESE OUT TO PRESENT TO CHEVROLET & OUR DEALERSHIP WHERE OUR CAR CURRENTLY SITS UNUSABLE. WE HAVE ALREADY CONTACTED CHEVROLET, & OUR WARRANTY COMPANY IN HOPES TO FIND A RESOLUTION AND WE WISH/HOPE A RECALL WILL BE ISSUED FOR THE MANY CASES LIKE OURS. I AM WILLING TO PROVIDE ANY PROOF IF NEEDED. THIS CAR HAS MANY COMPLAINTS AND COMMONLY THIS COMPLAINT REGARDING SUDDEN ENGINE BLOWING UP.. THE PART THAT HAS US UPSET IS THAT THE MANUFACTURER AND DEALERSHIPS SEEMINGLY AREN'T TAKING RESPONSIBILITY FOR THIS AND MANY PEOPLE ARE LOSING MONEY AND POSSIBLY SAFETY IN THEIR CARS BECAUSE OF THIS ISSUE. PLEASE HELP US. *TR
NHTSA ODI #10243261
54,541 miles · Sep 14, 2008
Engine And Engine Cooling
TIMING BELT BROKE PREMATURELY AT 54541 MILES. GM OWNERS MANUAL SAYS TO CHANGE IT AT 60000 MILES. CAR WAS WORKED ON BY GM UNDER THERE SPECIAL BULLETIN FOR THIS PROBLEM. HOWEVER THE CAR HAD TO BE RETURNED TO THE DEALER, THIS TIME IT 56870 MILES ON IT WHEN THE SES LIGHT CAME ON I TOOK THE CAR TO AAMACO ON SATURDAY BECAUSE THE DEALE…
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TIMING BELT BROKE PREMATURELY AT 54541 MILES. GM OWNERS MANUAL SAYS TO CHANGE IT AT 60000 MILES. CAR WAS WORKED ON BY GM UNDER THERE SPECIAL BULLETIN FOR THIS PROBLEM. HOWEVER THE CAR HAD TO BE RETURNED TO THE DEALER, THIS TIME IT 56870 MILES ON IT WHEN THE SES LIGHT CAME ON I TOOK THE CAR TO AAMACO ON SATURDAY BECAUSE THE DEALERSHIP WAS CLOSED SOME OF THE CODES WERE MY TRANSMISSION I WAS TOLD IT WASN'T GOING IN 4TH GEAR AND BURNED MY TRANSMISSION FLUID. SO I HAD MY TRANSMISSION SERVICED AT MY EXPENSE BY THE DEALERSHIP. THE DEALERSHIP TOLD ME THAT GM HAD THE PART #'S LISTED WRONG AND THEY HAD INSTALLED THE WRONG PARTS WHEN THEY HAD WORKED ON THE CAR THE FIRST TIME. SO NOW THEY PUT IN NEW PARTS AND THE CAR STILL DOESN'T RUN RIGHT. THEY TELL ME I NEED NEW PLUGS AND WIRES AND THAT THE COST WOULD BE 300.00. I TOLD THEM NO WAY I WAS GIVEN THEM 300.00 FOR 4 PLUGS AND 4 WIRES. SO THEY ENDED UP CHANGING THE PLUGS FOR 32.00 AND I CHANGED THE WIRES MYSELF. AT 56987 MILES CAR GOES BACK TO DEALER THIRD TIME, SES LIGHT ON, CAUSE : INTAKE MANIFOLD TUNING SOLENOID DISCONNECTED AND TIMING BELT TO TIGHT. AT 57012 MILES A C/S SES LIGHT ON, CAUSE; LOW EFFICIENCY THE DEALER REPLACED THE CATALYTIC CONVERTER DUE TO THE TIMING BELT. CAR HAS NEVER RUN RIGHT AFTER THESE ATTEMPTS OF REPAIRS AND NOW SEPT. 2008 SES LIGHT COMES ON AGAIN THE HAS 66200 MILES ON IT. TOOK IT TO THE DEALER AND THEY TOLD ME I NEEDED NEW WIRES AND PLUGS AGAIN AND THAT THEY COULD NOT DO ANYTHING IF I DID NOT LET THEM CHANGE THEM. THIS IS JUST ANOTHER CASE OF GM NOT STANDING BEHIND THERE PRODUCTS THAT FAIL. *TR
NHTSA ODI #10242093
53,963 miles · Aug 19, 2008
Engine And Engine Cooling
MY 2004 CHEVY AVEO BROKE DOWN IN THE MIDDLE OF AN INTERSECTION AT 47,652 MILES. THE CAR WOULDN'T START AND COULDN'T BE MOVED WHILE MY DAUGHTER AND GRANDSON WERE STRANDED IN TRAFFIC. THE PROBLEM TURNED OUT TO BE THE TIMING BELT WHICH SHOULD HAVE LASTED 2X THE MILEAGE. THEN ENGINE RATTLED AFTER THAT REPAIR. ON 17AUG08 MY CAR S…
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MY 2004 CHEVY AVEO BROKE DOWN IN THE MIDDLE OF AN INTERSECTION AT 47,652 MILES. THE CAR WOULDN'T START AND COULDN'T BE MOVED WHILE MY DAUGHTER AND GRANDSON WERE STRANDED IN TRAFFIC. THE PROBLEM TURNED OUT TO BE THE TIMING BELT WHICH SHOULD HAVE LASTED 2X THE MILEAGE. THEN ENGINE RATTLED AFTER THAT REPAIR. ON 17AUG08 MY CAR STARTED SMOKING FROM UNDER THE HOOD. WHEN I OPENED THE HOOD, ANTIFREEZE COVERED EVERYTHING. I TOOK IT TO THE DEALER WHO TOLD ME THE BELT TENSIONER WAS BAD CAUSING THE RATTLE AND THE THERMOSTAT HOUSING CRACKED CAUSING THE ANTIFREEZE TO SPEW UPWARD AND CASCADE OVER THE TOP OF THE ENTIRE ENGINE. *TR
NHTSA ODI #10238938
Mileage unknown · May 22, 2008
Engine And Engine Cooling
2004 CHEVROLET AVEO BROKEN TIMING BELT. CONSUMER STATES THAT DEALER STATED THAT THE PROBLEM WAS UNDER WARRANTY AND REPLACED THE VALVES BECAUSE THEY WERE BENT. CONSUMER WOULD LIKE TO KNOW WHY THE TIMING BELT WAS NOT REPLACED. *KB THE CONSUMER STATED A TSB HAD BEEN ISSUED FOR THE TIMING BELT PROBLEM.
NHTSA ODI #10228513
NHTSA investigations
2EA08005 · Stuck Throttle Valve
Opened Feb 14, 2008 · Closed Oct 14, 2008
Status: closed (inferred from source dates) · Engine And Engine Cooling:exhaust System:emission Control:crankcase (pcv); Vehicle Speed Control
TO DATE, THE OFFICE OF DEFECTS INVESTIGATION (ODI) IS AWARE OF 29 NON-DUPLICATIVE COMPLAINTS/FIELD REPORTS AND 52 WARRANTY CLAIMS RELATED TO THE ALLEGED DEFECT AFFECTING 69 UNIQUE SUBJECT VEHICLES.BECAUSE THE ALLEGED DEFECT CONDITION IS MOST LIKELY TO OCCUR DURING WINTER MONTHS WHEN AMBIENT TEMPERATURES ARE BELOW FREEZING, ODI UPGRADED THIS INVESTIGATION TO AN ENGINEERING ANALYSIS ON FEBRUARY 14, 2008 SO THAT IT COULD CONTINUE TO MONITOR THE FIELD EXPERIENCE DURING THE 2007/2008 WINTER SEASON.BY LETTER DATED MAY 22, 2008, GENERAL MOTORS CORP. (GM) SUPPLEMENTED ITS PREVIOUS INFORMATION REQUEST RESPONSE WITH FIELD DATA RECEIVED BY GM THROUGH MAY 1, 2008.ACCORDING TO GM, WHEN MOISTURE FREEZES IN THE POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM AND/OR THE ENGINE AIR INTAKE TRACT IT IS MOST OFTEN OBSERVED AS A HARD TO START/NO START CONDITION, THROTTLE STUCK CLOSED, ROUGH RUNNING ENGINE, STALLING AT IDLE, OR OIL LEAKAGE.OF THE 29 COMPLAINTS RELATED TO STUCK THROTTLE, ODI IDENTIFIED 5 REPORTS THAT ALLEGE UNWANTED ACCELERATION, 13 REPORTS DESCRIBE AN APPARENT HIGH-IDLE CONDITION AT START UP OR WHEN SLOWING THE VEHICLE TO A STOP WITHOUT ANY ALLEGATION OF UNWANTED ACCELERATION OR DIMINISHED BRAKING PERFORMANCE, AND THE REMAINING 11 REPORTS DESCRIBE AMBIGUOUS ALLEGATIONS OF STUCK THROTTLE WITHOUT REGARD TO SEVERITY OR CONSEQUENCE.ODI ANALYSIS OF FIELD INCIDENT DATA SHOWS THAT THE COMPLAINT AND WARRANTY TRENDS APPEAR TO BE IN DECLINE, WITH ONLY 1 ADDITIONAL COMPLAINT AND 6 WARRANTY CLAIMS RELATED TO THE ALLEGED DEFECT RECEIVED BY GM SINCE APRIL 2007. A SAFETY-RELATED DEFECT TREND HAS NOT BEEN IDENTIFIED AT THIS TIME AND FURTHER USE OF AGENCY RESOURCES DOES NOT APPEAR TO BE WARRANTED.ACCORDINGLY, THIS INVESTIGATION HAS BEEN CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.
Additional source detail variants (2)
Engine And Engine Cooling:exhaust System:emission Control:crankcase (pcv)
TO DATE, THE OFFICE OF DEFECTS INVESTIGATION (ODI) IS AWARE OF 29 NON-DUPLICATIVE COMPLAINTS/FIELD REPORTS AND 52 WARRANTY CLAIMS RELATED TO THE ALLEGED DEFECT AFFECTING 69 UNIQUE SUBJECT VEHICLES.BECAUSE THE ALLEGED DEFECT CONDITION IS MOST LIKELY TO OCCUR DURING WINTER MONTHS WHEN AMBIENT TEMPERATURES ARE BELOW FREEZING, ODI UPGRADED THIS INVESTIGATION TO AN ENGINEERING ANALYSIS ON FEBRUARY 14, 2008 SO THAT IT COULD CONTINUE TO MONITOR THE FIELD EXPERIENCE DURING THE 2007/2008 WINTER SEASON.BY LETTER DATED MAY 22, 2008, GENERAL MOTORS CORP. (GM) SUPPLEMENTED ITS PREVIOUS INFORMATION REQUEST RESPONSE WITH FIELD DATA RECEIVED BY GM THROUGH MAY 1, 2008.ACCORDING TO GM, WHEN MOISTURE FREEZES IN THE POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM AND/OR THE ENGINE AIR INTAKE TRACT IT IS MOST OFTEN OBSERVED AS A HARD TO START/NO START CONDITION, THROTTLE STUCK CLOSED, ROUGH RUNNING ENGINE, STALLING AT IDLE, OR OIL LEAKAGE.OF THE 29 COMPLAINTS RELATED TO STUCK THROTTLE, ODI IDENTIFIED 5 REPORTS THAT ALLEGE UNWANTED ACCELERATION, 13 REPORTS DESCRIBE AN APPARENT HIGH-IDLE CONDITION AT START UP OR WHEN SLOWING THE VEHICLE TO A STOP WITHOUT ANY ALLEGATION OF UNWANTED ACCELERATION OR DIMINISHED BRAKING PERFORMANCE, AND THE REMAINING 11 REPORTS DESCRIBE AMBIGUOUS ALLEGATIONS OF STUCK THROTTLE WITHOUT REGARD TO SEVERITY OR CONSEQUENCE.ODI ANALYSIS OF FIELD INCIDENT DATA SHOWS THAT THE COMPLAINT AND WARRANTY TRENDS APPEAR TO BE IN DECLINE, WITH ONLY 1 ADDITIONAL COMPLAINT AND 6 WARRANTY CLAIMS RELATED TO THE ALLEGED DEFECT RECEIVED BY GM SINCE APRIL 2007. A SAFETY-RELATED DEFECT TREND HAS NOT BEEN IDENTIFIED AT THIS TIME AND FURTHER USE OF AGENCY RESOURCES DOES NOT APPEAR TO BE WARRANTED.ACCORDINGLY, THIS INVESTIGATION HAS BEEN CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.
Vehicle Speed Control
TO DATE, THE OFFICE OF DEFECTS INVESTIGATION (ODI) IS AWARE OF 29 NON-DUPLICATIVE COMPLAINTS/FIELD REPORTS AND 52 WARRANTY CLAIMS RELATED TO THE ALLEGED DEFECT AFFECTING 69 UNIQUE SUBJECT VEHICLES.BECAUSE THE ALLEGED DEFECT CONDITION IS MOST LIKELY TO OCCUR DURING WINTER MONTHS WHEN AMBIENT TEMPERATURES ARE BELOW FREEZING, ODI UPGRADED THIS INVESTIGATION TO AN ENGINEERING ANALYSIS ON FEBRUARY 14, 2008 SO THAT IT COULD CONTINUE TO MONITOR THE FIELD EXPERIENCE DURING THE 2007/2008 WINTER SEASON.BY LETTER DATED MAY 22, 2008, GENERAL MOTORS CORP. (GM) SUPPLEMENTED ITS PREVIOUS INFORMATION REQUEST RESPONSE WITH FIELD DATA RECEIVED BY GM THROUGH MAY 1, 2008.ACCORDING TO GM, WHEN MOISTURE FREEZES IN THE POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM AND/OR THE ENGINE AIR INTAKE TRACT IT IS MOST OFTEN OBSERVED AS A HARD TO START/NO START CONDITION, THROTTLE STUCK CLOSED, ROUGH RUNNING ENGINE, STALLING AT IDLE, OR OIL LEAKAGE.OF THE 29 COMPLAINTS RELATED TO STUCK THROTTLE, ODI IDENTIFIED 5 REPORTS THAT ALLEGE UNWANTED ACCELERATION, 13 REPORTS DESCRIBE AN APPARENT HIGH-IDLE CONDITION AT START UP OR WHEN SLOWING THE VEHICLE TO A STOP WITHOUT ANY ALLEGATION OF UNWANTED ACCELERATION OR DIMINISHED BRAKING PERFORMANCE, AND THE REMAINING 11 REPORTS DESCRIBE AMBIGUOUS ALLEGATIONS OF STUCK THROTTLE WITHOUT REGARD TO SEVERITY OR CONSEQUENCE.ODI ANALYSIS OF FIELD INCIDENT DATA SHOWS THAT THE COMPLAINT AND WARRANTY TRENDS APPEAR TO BE IN DECLINE, WITH ONLY 1 ADDITIONAL COMPLAINT AND 6 WARRANTY CLAIMS RELATED TO THE ALLEGED DEFECT RECEIVED BY GM SINCE APRIL 2007. A SAFETY-RELATED DEFECT TREND HAS NOT BEEN IDENTIFIED AT THIS TIME AND FURTHER USE OF AGENCY RESOURCES DOES NOT APPEAR TO BE WARRANTED.ACCORDINGLY, THIS INVESTIGATION HAS BEEN CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.
PE07051 · Stuck Throttle Valve
Opened Oct 19, 2007 · Closed Feb 14, 2008
Status: closed (inferred from source dates) · Engine And Engine Cooling:exhaust System:emission Control:crankcase (pcv); Vehicle Speed Control
ON OCTOBER 19, 2007, THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED A PRELIMINARY EVALUATION TO INVESTIGATE ALLEGED STUCK THROTTLE INCIDENTS DUE TO ICE FORMATION WITHIN THE ENGINE AIR INTAKE TRACT IN CERTAIN MODEL YEAR (MY) 2004-2005 CHEVROLET AVEO VEHICLES MANUFACTURED FOR SALE OR LEASE IN THE UNITED STATES.THIS INVESTIGATION WAS PROMPTED BY A SAFETY RECALL CAMPAIGN (05F-069) CONDUCTED BY GENERAL MOTORS CORP. (GM) INVOLVING SUBSTANTIALLY SIMILAR VEHICLES MANUFACTURED FOR SALE OR LEASE IN CANADA.AT THAT TIME, GM ISSUED A TECHNICAL SERVICE BULLETIN (TSB #05-06-04-065) TO ADDRESS THE ALLEGED DEFECT CONDITION IN U.S. VEHICLES.GM SUBSEQUENTLY REVISED THE CANADIAN RECALL CAMPAIGN TO INCLUDE MORE DETAILED INSTRUCTIONS AFTER IT DISCOVERED CERTAIN VEHICLES WERE NOT PROPERLY SERVICED UNDER THE ORIGINAL RECALL CAMPAIGN.GM REVISED THE CANADIAN RECALL CAMPAIGN A SECOND TIME TO INCLUDE MORE SUBSTANTIAL CHANGES TO THE THROTTLE BODY, INTAKE MANIFOLD, POSITIVE CRANKCASE VENTILATION (PCV) AND ENGINE COOLING SYSTEMS TO FURTHER REDUCE THE LIKELIHOOD OF ICING WITHIN THE ENGINE AIR INTAKE TRACT.AGAIN, GM ISSUED A TECHNICAL SERVICE BULLETIN (TSB #08-06-04-009) TO ADDRESS THE ALLEGED DEFECT CONDITION IN U.S. VEHICLES USING THE REVISED PROCEDURE.ODI IS AWARE OF 28 NON-DUPLICATIVE COMPLAINTS/FIELD REPORTS AND 46 WARRANTY CLAIMS RELATED TO THE ALLEGED DEFECT AFFECTING 63 UNIQUE SUBJECT VEHICLES.THE ALLEGED DEFECT CONDITION IS MOST LIKELY TO OCCUR DURING THE WINTER MONTHS WHEN AMBIENT TEMPERATURES ARE BELOW FREEZING.HOWEVER, THE INFORMATION PROVIDED IN GM'S RESPONSE TO ODI'S INFORMATION REQUEST LETTER DATED NOVEMBER 2, 2007, DOES NOT CAPTURE EVENTS THAT MAY HAVE OCCURRED DURING THE MOST RECENT WINTER MONTHS.ACCORDINGLY, THIS INVESTIGATION HAS BEEN UPGRADED TO AN ENGINEERING ANALYSIS (EA08-005) TO FURTHER STUDY THE FREQUENCY OF THE ALLEGED DEFECT.
Additional source detail variants (2)
Engine And Engine Cooling:exhaust System:emission Control:crankcase (pcv)
ON OCTOBER 19, 2007, THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED A PRELIMINARY EVALUATION TO INVESTIGATE ALLEGED STUCK THROTTLE INCIDENTS DUE TO ICE FORMATION WITHIN THE ENGINE AIR INTAKE TRACT IN CERTAIN MODEL YEAR (MY) 2004-2005 CHEVROLET AVEO VEHICLES MANUFACTURED FOR SALE OR LEASE IN THE UNITED STATES.THIS INVESTIGATION WAS PROMPTED BY A SAFETY RECALL CAMPAIGN (05F-069) CONDUCTED BY GENERAL MOTORS CORP. (GM) INVOLVING SUBSTANTIALLY SIMILAR VEHICLES MANUFACTURED FOR SALE OR LEASE IN CANADA.AT THAT TIME, GM ISSUED A TECHNICAL SERVICE BULLETIN (TSB #05-06-04-065) TO ADDRESS THE ALLEGED DEFECT CONDITION IN U.S. VEHICLES.GM SUBSEQUENTLY REVISED THE CANADIAN RECALL CAMPAIGN TO INCLUDE MORE DETAILED INSTRUCTIONS AFTER IT DISCOVERED CERTAIN VEHICLES WERE NOT PROPERLY SERVICED UNDER THE ORIGINAL RECALL CAMPAIGN.GM REVISED THE CANADIAN RECALL CAMPAIGN A SECOND TIME TO INCLUDE MORE SUBSTANTIAL CHANGES TO THE THROTTLE BODY, INTAKE MANIFOLD, POSITIVE CRANKCASE VENTILATION (PCV) AND ENGINE COOLING SYSTEMS TO FURTHER REDUCE THE LIKELIHOOD OF ICING WITHIN THE ENGINE AIR INTAKE TRACT.AGAIN, GM ISSUED A TECHNICAL SERVICE BULLETIN (TSB #08-06-04-009) TO ADDRESS THE ALLEGED DEFECT CONDITION IN U.S. VEHICLES USING THE REVISED PROCEDURE.ODI IS AWARE OF 28 NON-DUPLICATIVE COMPLAINTS/FIELD REPORTS AND 46 WARRANTY CLAIMS RELATED TO THE ALLEGED DEFECT AFFECTING 63 UNIQUE SUBJECT VEHICLES.THE ALLEGED DEFECT CONDITION IS MOST LIKELY TO OCCUR DURING THE WINTER MONTHS WHEN AMBIENT TEMPERATURES ARE BELOW FREEZING.HOWEVER, THE INFORMATION PROVIDED IN GM'S RESPONSE TO ODI'S INFORMATION REQUEST LETTER DATED NOVEMBER 2, 2007, DOES NOT CAPTURE EVENTS THAT MAY HAVE OCCURRED DURING THE MOST RECENT WINTER MONTHS.ACCORDINGLY, THIS INVESTIGATION HAS BEEN UPGRADED TO AN ENGINEERING ANALYSIS (EA08-005) TO FURTHER STUDY THE FREQUENCY OF THE ALLEGED DEFECT.
Vehicle Speed Control
ON OCTOBER 19, 2007, THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED A PRELIMINARY EVALUATION TO INVESTIGATE ALLEGED STUCK THROTTLE INCIDENTS DUE TO ICE FORMATION WITHIN THE ENGINE AIR INTAKE TRACT IN CERTAIN MODEL YEAR (MY) 2004-2005 CHEVROLET AVEO VEHICLES MANUFACTURED FOR SALE OR LEASE IN THE UNITED STATES.THIS INVESTIGATION WAS PROMPTED BY A SAFETY RECALL CAMPAIGN (05F-069) CONDUCTED BY GENERAL MOTORS CORP. (GM) INVOLVING SUBSTANTIALLY SIMILAR VEHICLES MANUFACTURED FOR SALE OR LEASE IN CANADA.AT THAT TIME, GM ISSUED A TECHNICAL SERVICE BULLETIN (TSB #05-06-04-065) TO ADDRESS THE ALLEGED DEFECT CONDITION IN U.S. VEHICLES.GM SUBSEQUENTLY REVISED THE CANADIAN RECALL CAMPAIGN TO INCLUDE MORE DETAILED INSTRUCTIONS AFTER IT DISCOVERED CERTAIN VEHICLES WERE NOT PROPERLY SERVICED UNDER THE ORIGINAL RECALL CAMPAIGN.GM REVISED THE CANADIAN RECALL CAMPAIGN A SECOND TIME TO INCLUDE MORE SUBSTANTIAL CHANGES TO THE THROTTLE BODY, INTAKE MANIFOLD, POSITIVE CRANKCASE VENTILATION (PCV) AND ENGINE COOLING SYSTEMS TO FURTHER REDUCE THE LIKELIHOOD OF ICING WITHIN THE ENGINE AIR INTAKE TRACT.AGAIN, GM ISSUED A TECHNICAL SERVICE BULLETIN (TSB #08-06-04-009) TO ADDRESS THE ALLEGED DEFECT CONDITION IN U.S. VEHICLES USING THE REVISED PROCEDURE.ODI IS AWARE OF 28 NON-DUPLICATIVE COMPLAINTS/FIELD REPORTS AND 46 WARRANTY CLAIMS RELATED TO THE ALLEGED DEFECT AFFECTING 63 UNIQUE SUBJECT VEHICLES.THE ALLEGED DEFECT CONDITION IS MOST LIKELY TO OCCUR DURING THE WINTER MONTHS WHEN AMBIENT TEMPERATURES ARE BELOW FREEZING.HOWEVER, THE INFORMATION PROVIDED IN GM'S RESPONSE TO ODI'S INFORMATION REQUEST LETTER DATED NOVEMBER 2, 2007, DOES NOT CAPTURE EVENTS THAT MAY HAVE OCCURRED DURING THE MOST RECENT WINTER MONTHS.ACCORDINGLY, THIS INVESTIGATION HAS BEEN UPGRADED TO AN ENGINEERING ANALYSIS (EA08-005) TO FURTHER STUDY THE FREQUENCY OF THE ALLEGED DEFECT.
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