B0989 Diagnostic Trouble Code

B0989 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 B0989 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
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.
Some aftermarket accessories and performance modifications

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. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.

Process Tips

Diagnostic trouble code B0989 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 B0989.

Fortunately, B0989 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0989 Trouble Code For Specific Cars

B0989 Toyota Runx Park Lamp Relay Coil Short to Battery
B0989 Porsche 930 Fuel Demand Command Signal Circuit Malfunction
B0989 Mini Ii ASM Control Circuit Intermittent
B0989 Audi V8 Audio Rear Control Unit is Not Responding
B0989 Edsel Pacer Inertia Switch input Circuit Open
B0989 Messerschmitt Tiger Air Suspension RF Corner Down Timeout
B0989 Nsu Ro Cylinder 11 Misfire Detected