C0128 Diagnostic Trouble Code

C0128 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 C0128 diagnostic trouble code may include:

Reduction in engine performance, especially at low RPM levels
Vacuum leak on the engine
Diminished fuel efficiency
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
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. Now, clear the codes and test-drive the vehicle to see if the code is reset.

Process Tips

Diagnostic trouble code C0128 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 C0128.

Fortunately, C0128 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0128 Trouble Code For Specific Cars

C0128 Bentley State Blower (Fan) Circuit Failure
C0128 Chevrolet Pickup EGRV Circuit Malfunction
C0128 Kia Sportage Sensor Power Supply Malfunction
C0128 Buchmann Cw Cylinder #1 High To Low Side Short
C0128 Mercedes Sl 600 Air Bag Crash Sensor #2 Ground Circuit Open
C0128 Oldsmobile Custom Cylinder 7 Misfire Detected
C0128 Dkw F89 Idle Control System RPM lower Than Expected