P17AB Diagnostic Trouble Code

P17AB 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 P17AB diagnostic trouble code may include:

Faulty O2 Sensor
Lack of power
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 :

Defective ECU strategies or components will prevent proper regeneration
The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Fuel with a large percentage of sulfur will clog the DPF quickly

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. If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code P17AB 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 P17AB.

Fortunately, P17AB is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P17AB Trouble Code For Specific Cars

P17AB Enzmann 506 Injection Pump Fuel Metering Control "B" Low (Cam/Rotor/Injector)
P17AB Elfin Ms Injection Pump Fuel Metering Control "A" High (Cam/Rotor/Injector)
P17AB Leidart V-8 TCM Communication Circuit Range/Performance
P17AB Saab 900 Ignition Run/Start Circuit Open
P17AB Nissan Phaeton Cooling Fan 2 Control Circuit Malfunction
P17AB Holden Lx Power Steering Pressure Sensor Circuit Range/Performance
P17AB Mazda 5 Transmission Transfer Case Contact Plate 'C' Short Circuit To Battery