C1927 Diagnostic Trouble Code

C1927 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 C1927 diagnostic trouble code may include:

Faulty PCM
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Poor acceleration
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. Look at the plug wires to make sure they are not burnt or laying on the exhaust. Now, clear the codes and test-drive the vehicle to see if the code is reset.

Process Tips

Diagnostic trouble code C1927 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 C1927.

Fortunately, C1927 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1927 Trouble Code For Specific Cars

C1927 Ford Popular Mirror Passenger Horizontal Feedback Potentiometer Circuit Failure
C1927 Pontiac Trans Sport Front Crash Sensor Internal Fault
C1927 Healey Westland Passengers Seat Belt Buckle Switch Circuit Short to Ground
C1927 Italdesign Nazca
C1927 Isuzu Florian
C1927 Mercury Mountaineer Iii Air Suspension Rear Inflator Solenoid Output Circuit Open
C1927 Chrysler Cordoba Engine Speed Input Circuit No Signal