B3075 Diagnostic Trouble Code

B3075 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 B3075 diagnostic trouble code may include:

Faulty or damaged wiring
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
Poor fuel economy
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
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 :

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.

Process Tips

Diagnostic trouble code B3075 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 B3075.

Fortunately, B3075 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B3075 Trouble Code For Specific Cars

B3075 Maserati Mexico Transmission Fluid Pressure Sensor/Switch F Circuit Low
B3075 Hyundai Portico SCP (J1850) Invalid or Missing Data for Digital Audio Tape
B3075 Mercury Colony Air Suspension LR Air Compress Request Exceeded Max Timing
B3075 Packard 300 DPFE Circuit Low Input
B3075 Renault Megan Heated Backlite Input Circuit Failure
B3075 Opel Mokka Door Ajar Lamp Circuit Open
B3075 Daewoo Musson Gauge Driver Circuit Fault