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Po420
1999 Chevrolet Tahoe

Po420

(1999 Chevrolet Tahoe)
mechanic has replaced all sensors in this vehicle and it is still throwing this code could it be the catalyc converter that is bad
1 answer & 0 comments
Popular Answer
on June 04, 2010
Here is a ton of great info on the P0420 trouble code: http://repairpal.com/OBD-II-Code-P0420
There's even some info that your technician can use to help diagnose this, which they apparently need.
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General Diagnosis
$88 - $111 Learn More
on June 04, 2010
Here is a ton of great info on the P0420 trouble code: http://repairpal.com/OBD-II-Code-P0420
There's even some info that your technician can use to help diagnose this, which they apparently need.
Sign in to reply

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