P229A Diagnostic Trouble Code

P229A 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 P229A diagnostic trouble code may include:

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
Faulty or damaged wiring
Hesitation upon acceleration
Reduction in engine performance, especially at low RPM levels

Possible Causes :

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.
Some aftermarket accessories and performance modifications
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

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. 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.

Process Tips

Diagnostic trouble code P229A 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 P229A.

Fortunately, P229A is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P229A Trouble Code For Specific Cars

P229A Toyota Fxs Oil Change Lamp Circuit Short To Ground
P229A Mini Countryman ASM Control Circuit [Up / Down / Auto / etc]
P229A Ford Gran Torino Mirror Driver Left Circuit Failure
P229A Tvr Type S Power Steering Pressure Sensor Circuit Malfunction
P229A Nissan Primastar Crankshaft Position Camshaft Position Correlation (Bank 1 Sensor A)
P229A Ogle 1.5 Cylinder 3 Injector Circuit High
P229A Volvo 264 SCP (J1850) Invalid or Missing Data for Door Locks