B0383 Diagnostic Trouble Code

B0383 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 B0383 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
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
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 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. 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 B0383 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 B0383.

Fortunately, B0383 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0383 Trouble Code For Specific Cars

B0383 Volkswagen Crossgolf RF CORNER LAMP OUTPUT Ckt Short to Battery
B0383 Audi 75 Alternator Load Input Failed High
B0383 Porsche 911 Type 991 FTS High - Fuel Pump Temperature Sensor High
B0383 Renault Grand Scenic Glow Plug Circuit Low Input (Bank #1)
B0383 Tvr Taimar Power Sliding Door Override Switch Input Ckt Short to Gnd
B0383 Holden Premier Power Supply Sensor Circuit Short To Battery
B0383 Ford Fairmont