C0028 Diagnostic Trouble Code

C0028 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 C0028 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code C0028 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 C0028.

Fortunately, C0028 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0028 Trouble Code For Specific Cars

C0028 Ford C Lockup Solenoid System
C0028 Chery Eastar Double Locking Door Motor Frozen
C0028 Mg Zt-t ANTI THEFT HORN OUTPUT CIRCUIT Failure
C0028 Royce 10 Hp Ignition Key-In Circuit Short To Ground
C0028 Gobron 20 Park/Neutral Switch Circuit Short To Battery
C0028 Nissan Pao Coolant Temp Out of Range
C0028 Toyota Soluna Parklamp Output Relay Dirver Short to Battery