P22A4 Diagnostic Trouble Code

P22A4 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 P22A4 diagnostic trouble code may include:

Engine surge
Blown fuse (if applicable)
Lack of power
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.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. 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. 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 P22A4 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 P22A4.

Fortunately, P22A4 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P22A4 Trouble Code For Specific Cars

P22A4 Alfa Romeo Gp159 Air Assist Control Valve Range/Performance
P22A4 Fiat Coupe Lamp Keypad Output Circuit Failure
P22A4 Chrysler Sebring Iii Exhaust Gas Recirculation Flow Insufficient Detected
P22A4 Melkus Rs1000 A/C Request Signal Circuit Short to Ground
P22A4 Toyota Noah Over Temperature Fault
P22A4 Gaz 3110 O2 Sensor Circuit Malfunction (Bank 2 Sensor 3)
P22A4 Fiat 24 Hp Lamp ABS Warning Output Circuit Open