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2004 Chev Monte Carlo Code P0135


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nemismom
New User

Aug 26, 2011, 12:08 PM

Post #1 of 2 (4921 views)
2004 Chev Monte Carlo Code P0135 Sign In

I have a 2004 Chevrolet Monte Carlo SS with a V6 engine. I am getting the check engine light on sporadically. I called Onstar and they said it had to do with the emissions, power train or fuel system (narrows it right down). Code is P0135. I am having no trouble at all with the car. Any ideas before I take it to the dealer? Mileage is about 71,600. Only warranty left is the emissions system. Thanks.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 26, 2011, 12:22 PM

Post #2 of 2 (4908 views)
Re: 2004 Chev Monte Carlo Code P0135 Sign In

The heater is burnt out in the upstream O/2 sensor for bank 1. Replace the sensor and you should be good to go.



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