Question about 2004 Jeep Grand Cherokee

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2004 Grand Jeep Cheorkee: Check Engine Light code conflict

Hi all, I have a 2004 Grand Jeep Cheorkee. The check engine light has been on for a few months. In the winter, they pulled the code and it was 1281 (Air Fuel metering Sys/Engine cold too long). I had it rescanned yesterday, because I'm due for an inspection, and now I was told the code is: P0135. Is that possible?? Are they related or potentially the same thing? Do I need to get both the 02 sensor and the thermostat fixed? Should I tell them about both codes when I go back to get my Jeep fixed? Thanks so much!

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You need to inspect those parts. The two codes, in a way are related. But they happened in different seasons. These newer cars are picky about what is going on and the signals it receives. A scan-tool is needed to see or collect active data from that O2 sensor and see if it is bad.
If the thermostat is bad then replace it but I can't tell you if you need an O2 sensor. You can tell the service rep. about what you found, it cant hurt.

Posted on Apr 23, 2010

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What does code po121 means?

Posted on Mar 10, 2013

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Posted on Jan 02, 2017

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