P0AC2 Diagnostic Trouble Code

P0AC2 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 P0AC2 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 light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Fuel with a large percentage of sulfur will clog the DPF quickly

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. 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 P0AC2 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 P0AC2.

Fortunately, P0AC2 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0AC2 Trouble Code For Specific Cars

P0AC2 Renault 12 Gauge Driver Circuit Fault
P0AC2 Volvo 360
P0AC2 Seat Toledo 2 Input/Turbine Speed Sensor Circuit Range/Performance
P0AC2 Pag Nick Driver Memory Power Switch Indicator Circuit Short to Battery
P0AC2 Sunbeam Tiger MAP/MAF Throttle Position Correlation
P0AC2 Ginetta G2 Oil Pressure Control Solenoid Circuit Malfunction
P0AC2 Renault Latitude Hazard Flash Output Circuit Open