B0869 Diagnostic Trouble Code

B0869 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 B0869 diagnostic trouble code may include:

Misfire
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly

Possible Causes :

A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Faulty IMRC actuator/sensor
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code B0869 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 B0869.

Fortunately, B0869 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0869 Trouble Code For Specific Cars

B0869 Riley Elf Horn Relay Coil Circuit Short to Vbatt
B0869 Lexus Gs TCM Power Input Signal Range/Performance
B0869 Griffith Gt Passenger Seatback Rearward Switch Circuit Short to Ground
B0869 Volvo Xc60 SCP (J1850) Invalid or Missing Data for Fuel System
B0869 Noble M14 Cylinder 10 Injector Circuit High
B0869 Simca 1309 Intake Valve Control Solenoid Circuit (Bank 2)
B0869 Austin 8 Autolamp Delay Circuit Short To Ground