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Check P1543 Fault Code

When you check engine light came on code P1543 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However your vehicle's manufacturer may have a different definition for the P1543 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

P1543 Code Reason

P1543 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.

P1543 Possible Fix :

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.

P1543 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P1543 OBD-II Trouble Code A/C System Performance is one of the definitions for the P1543; however your vehicles manufacturer may have a different definition for the P1543 code. Please check below for your specific make.

Reason For P1543 Code

The reason of P1543 OBD-II Fault Code Check is P1543 A/C System Performance.

P1543 Solution:

Excessive air inflow can be caused by a vacuum leak, a dirty sensor or, an exhaust gas recirculation valve not closing properly. If the problem is not enough fuel, the culprit may be dirty injectors or fuel filters, a weak fuel pump or a leaky fuel pressure regulator. The lean fuel mix error may be accompanied by rough idling, engine misfires, hesitation during acceleration and overall poor engine performance.

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