C0154 Diagnostic Trouble Code

C0154 is a kind of OBD-II Diagnostic C-Chassis Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a C0154 diagnostic trouble code may include:

Reduction in engine performance, especially at low RPM levels
Vacuum leak on the engine
Diminished fuel efficiency
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Dirty air cleaner element Damaged DPF

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Look at the plug wires to make sure they are not burnt or laying on the exhaust. If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs.

Process Tips

Diagnostic trouble code C0154 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before C0154.

Fortunately, C0154 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0154 Trouble Code For Specific Cars

C0154 Holden Gts Power Door Lock Circuit Short To Ground
C0154 Simca 1300 Intake Manifold Runner Control (Stuck Closed)
C0154 Volvo 343 SCP (J1850) Invalid or Missing Data for EEC Programming
C0154 Cadillac Brougham Data Mismatch (receive data does not match what was expected)
C0154 Simca Vedette Marly Internal Control Module Keep Alive Memory (KAM) Error
C0154 Toyota Brevis O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3)
C0154 Ford Tracer Mirror Switch Reference Voltage Negative Common Open Circuit