P0489 Diagnostic Trouble Code

P0489 is a kind of OBD-II Diagnostic P-Powertrain 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 P0489 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Hesitation upon acceleration

Possible Causes :

Some aftermarket accessories and performance modifications
A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

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. Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed.

Process Tips

Diagnostic trouble code P0489 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 P0489.

Fortunately, P0489 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0489 Trouble Code For Specific Cars

P0489 Subaru R2 License Lamp Circuit Failure
P0489 Jowett 9 Seat Headrest Feedback Potentiometer Circuit Open
P0489 Skoda 450 Keyless Entry Circuit Short To Ground
P0489 Audi 200 All Door Lock Input Short to Ground
P0489 Italdesign Twenty-twenty Seat Belt Switch Circuit Open
P0489 Alfa Romeo 66 Accelerometer Front Circuit Is Not Sensed
P0489 Dodge Prowler Ignition Run/Acc Circuit Open