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Expert
73 Answers
- Posted on Sep 20, 2015
Re: What does error code P0040 mean on a 2004 Chrysler...
O2 sensors connections for the front sensors are swapped, open (cut) or shorted out. The PCM may be bad if the sensors and wiring are ok.
If you recently worked on the sensors check your wiring. If not, You probably have a bad O2 sensor or the wiring is at fault.
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