P0420 on CHEVROLET MALIBU
What P0420 Means on Your CHEVROLET MALIBU
Real CHEVROLET MALIBU Owner Reports (Source: NHTSA Complaints Database)
"I have been experiencing an issue with the check engine light coming on almost every fuel fill up i have replaced the cap 3 times already and i keep getting the same code. now i am getting a p0420 code for either the catalytic converter or the oxygen sensor."
"The shift cable to the transmission became loose while vehicle was running. i was unable to shift the vehicle until the cable was reconnected by hand. the vehicle has an issue with accelerating especially when trying to go highway speeds. it cant flow into traffic normally."
Data from NHTSA Vehicle Complaints Database. All reports are filed by vehicle owners directly with the U.S. Department of Transportation.
Common Causes of P0420 on CHEVROLET MALIBU
Percentages based on NHTSA complaint component analysis for this vehicle.
Complaint Trend by Year
What To Do Next
-
1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if your vehicle is covered.
-
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50-$150) pinpoints the root cause before you spend money on parts.
-
3
Compare repair quotes
Get 2-3 quotes. Dealer vs independent shop prices often differ 30-50% for the same repair.