Having problems with your 2002 Cadillac Deville ?

P0133 code diagnostic - 2002 Cadillac Deville

Posted / edited by AnonymousUser on : 17-12-2018

Answers :

Code 133 is for a problem with the O2 sensor for bank one - the one in front of the catalytic converter. The signal coming into the computer is not switching back and forth between rich and lean as fast as it should.
Most of the time the sensor is at fault, but it would need to be checked out before it is replaced.
Repair Help & Product Troubleshooting for 2002 Cadillac Deville

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