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P1400 code - PT Cruiser Chrysler Cars & Trucks

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Hi there:

DTC P1400 - Differential Pressure Feedback Electronic (DPFE) sensor signal was below 0.2 volts. Enabling conditions: Run engine off or running self tests to check this code.

Blocking Action: This code can block the following monitors: Fuel Control, O2 monitor, catalyst, misfire, and EGR monitor.

Testing: Run the engine off and running self tests. If the code does not show up, it is an intermittent problem. Check for 5 volt reference that is low, damaged sensor or a short to ground in the signal wiring. Probes use an EGR position sensor signal which can be low because of a worn EGR pintle that drops too low in the EGR valve or for a warped EGR valve base.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

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Posted on Feb 24, 2012

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