P0AC1 Diagnostic Trouble Code

P0AC1 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 P0AC1 diagnostic trouble code may include:

Rich or lean exhaust
Fuel pressure too low
Engine surge
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)
Faulty IMRC actuator relay (if equipped)

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 all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve.

Process Tips

Diagnostic trouble code P0AC1 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 P0AC1.

Fortunately, P0AC1 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0AC1 Trouble Code For Specific Cars

P0AC1 Csc Mark I Fuel Tank Temperature Sensor Circuit Malfunction
P0AC1 Jaguar Xk Seat Driver Occupied Switch Circuit Open
P0AC1 Shelby 1 Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage
P0AC1 Stearns Knight B Lamp Park Input Circuit Short To Battery
P0AC1 Mg Zt-t ANTI THEFT HORN OUTPUT CIRCUIT Failure
P0AC1 Peugeot 408 EIC Switch-1 Assembly Circuit Short To Battery
P0AC1 Alfa Romeo Long Air Bag Crash Sensor #1 Feed/Return Circuit Short To Ground