C1038 Diagnostic Trouble Code

C1038 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 C1038 diagnostic trouble code may include:

Poor fuel economy
Possible spark knock (detonation / pre-ignition)
Misfire
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.
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors.

Process Tips

Diagnostic trouble code C1038 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 C1038.

Fortunately, C1038 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1038 Trouble Code For Specific Cars

C1038 Mazda Rustler 4X4 Switch Out of Self Test Range
C1038 Kia Sorento Ii Secondary Air Injection System Switching Valve B Circuit Shorted
C1038 Bmw C 650 Gt Climate Control Pushbutton Circuit Failure
C1038 Bentley S2 Battery Voltage High
C1038 Maybach 57 Transmission Reverse I/P Circuit Malfunction
C1038 Monteverdi Safari Battery Power Supply ECU Circuit Short To Battery
C1038 Austin Marina Autolamp Sensor Input Circuit Short To Ground