P2B89 Diagnostic Trouble Code

P2B89 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 P2B89 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
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 :

Look at the plug wires to make sure they are not burnt or laying on the exhaust. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code P2B89 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 P2B89.

Fortunately, P2B89 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P2B89 Trouble Code For Specific Cars

P2B89 Nissan Skyline Cruise Control On Signal Malfunction
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P2B89 Marauder 100 TrafficMaster Module Error
P2B89 Intermeccanica Indra SCP (J1850) Invalid or Missing Data for Legislated Diagnostics
P2B89 Mercury Mc4 Air Suspension Rear Height Sensor High (SE) Signal Circuit Failure
P2B89 Mercury Cougar Air Suspension LR Air Spring/Shock Solenoid Output Circuit Open
P2B89 Ford Tracer Mirror Switch Reference Voltage Negative Common Open Circuit