P0814 Diagnostic Trouble Code

P0814 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 P0814 diagnostic trouble code may include:

Rich or lean exhaust
Fuel pressure too low
Engine surge
Poor acceleration

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 :

If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs. 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 at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code P0814 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 P0814.

Fortunately, P0814 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0814 Trouble Code For Specific Cars

P0814 Ultima Spyder Power Supply Sensor Circuit Short To Battery
P0814 Mercury Mountaineer Air Suspension Rear Height Sensor Low Signal Circuit Short To Ground
P0814 Turner Mark Performance / Normal / Winter Mode Input Malfunction
P0814 Volvo Xc70
P0814 Saab 9-2
P0814 Bmw Serie 1 Clutch Position Fault
P0814 Peugeot 305 EGI Temperature Sensor Failure