P0420 on NISSAN ALTIMA
What P0420 Means on Your NISSAN ALTIMA
Real NISSAN ALTIMA Owner Reports (Source: NHTSA Complaints Database)
"I already went though p0420 issue few years back and i got it again. nissan dealer charged me whole lotta money to fix the issue and the warning sign came back again. went to local auto zone and it show p0420 again. please help."
"This year i am required to obtain a smog test for my 2005 nissan altima tha i purchased used from power volvo in california. my car is throwing off a p0420 code which requires a replacement to the pre-catalytic converter."
"Car arbitrarily stalled and cut off at low speeds and began to also jerk intermittently as if attempting to shut down while traveling at highway speeds...easily this could lend to a collision!!! service engine soon indicator illuminated on dash and has remained lit."
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 NISSAN ALTIMA
Percentages based on NHTSA complaint component analysis for this vehicle.
Complaint Trend by Year
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if your vehicle is covered.
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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.
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3
Compare repair quotes
Get 2-3 quotes. Dealer vs independent shop prices often differ 30-50% for the same repair.