2007 Peugeot 504 P0401 Fault Code Check

When you check 2007 Peugeot 504 car engine light came on code P0401 the reason should be Low EGR flow control is detected. However Peugeot manufacturer may have a different definition for the P0401 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

P0401 2007 2007 Peugeot 504 Code Clear

A good ground connection is also extremely important. P0401 2007 2007 Peugeot 504 engine problem because the presence of voltage at the panel harness won't make the panel work if there is a bad ground connection. Since the instrument cluster is mounted in a plastic dash, a separate ground wire or ground circuit through the wiring harness is usually needed to complete the power circuit. Refer again to the wiring diagram to find the ground path, and then check it with your ohmmeter. Do not use a self-powered test light because it cannot measure resistance (any resistance will lower circuit voltage).

2007 Peugeot 504 P0401 OBD-II Diagnostic Powertrain (P) Trouble Code Description

2007 Peugeot 504 car P0401 OBD-II Trouble Code Early Exhaust Gas Recirculation (EGR) systems component s include and EGR Valve, and Engine Control Μodule (ECΜ) Controlled Vacuum Switch Valve or EGR Solenoid and an EGR Vacuum Μodulator. Dependin

Reason For 2007 Peugeot 504 P0401 Code

The reason of 2007 Peugeot 504 P0401 OBD-II Fault Code Check is P0401 Exhaust Gas Recirculation Flow Insufficient Detected.
P0401 Code Reason

2007 Peugeot 504 P0401 Possibble Fix Ways :

Probably the biggest result of injector failure is due to the injectors having excessive return flow or back leakage. This is due to worn parts which allow excessive fuel to go through the diesel injector and to return back to the tank or fuel system. This causes a drop in rail pressure which results in hard starting or not starting at all.

The original multi-displacement system turned off opposite pairs of cylinders, allowing the engine to have three different configurations and displacements. P0401 2007 2007 Peugeot 504 code had an elaborate diagnostics procedure, including showing engine trouble codes on the air conditionning display. However, the system was troublesome, misunderstood by customers, and a rash of unpredictable failures led to the technology being quickly retired.

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