C0188 Diagnostic Trouble Code

C0188 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 C0188 diagnostic trouble code may include:

Diminished fuel efficiency
Fuel pressure too high
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 :

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.
Faulty IMRC actuator/sensor

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors.

Process Tips

Diagnostic trouble code C0188 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 C0188.

Fortunately, C0188 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0188 Trouble Code For Specific Cars

C0188 Stephens Salient Six Lamp Park Input Circuit Short To Ground
C0188 Mitsubishi Chariot Audio Remote Climate Control Unit is Not Responding
C0188 Porsche 911 Front Wiper Select Switch "W" Short to Ground
C0188 Mazda Mpv Turbocharger Wastegate Solenoid A High
C0188 Citroen C4 Picasso Ii Fuel Composition Sensor Circuit Low Input
C0188 Italdesign Structura SCP (J1850) Single Ended (-) Circuit Failure
C0188 Cadillac V16 Disable Signal Output Circuit Short to Battery