B1038 Diagnostic Trouble Code

B1038 is a kind of OBD-II Diagnostic B-Body 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 B1038 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
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.
Faulty IMRC actuator/sensor

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector.

Process Tips

Diagnostic trouble code B1038 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 B1038.

Fortunately, B1038 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1038 Trouble Code For Specific Cars

B1038 Kieft 2-litre Servo Motor Potentiometer Airintake Left Circuit Open
B1038 Ferrari 256 Input/Turbine Speed Sensor Circuit No Signal
B1038 Nissan X-terra Cylinder #7 High To Low Side Short
B1038 Darracq 8 Heated Catalyst Temperature Below Threshold (Bank 1)
B1038 Volkswagen Polo 5 Rotor Sensor Fault
B1038 Swallow Doretti Mk Mirror Driver/Passenger Switch Circuit Failure
B1038 Chrysler Airflow Engine Oil Temperature Sensor Low