Trouble Code: P1400


Manifold Differential Pressure Sensor Circuit Malfunction

Possible Causes:


MDP sensor signal circuit is open or shorted to ground

MDP sensor signal circuit is shorted to VREF or system power

MDP sensor is damaged or has failed

PCM has failed.................Its the same as the MAP sensor but it read in reverse on the scan tool. its located up top the intake plenum drivers side small black sensor bolted to the top. the fault is for a circuit malfunction I would check the sensor and wiring before replacing anything. also its very uncommon to have a failed egr valve, The solenoid is usually the failed part.

Last edited by mxmikie; 09/04/14 09:44 AM.
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