P1259 Diagnostic Trouble Code

P1259 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 P1259 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 :

Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors. 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.

Process Tips

Diagnostic trouble code P1259 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 P1259.

Fortunately, P1259 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1259 Trouble Code For Specific Cars

P1259 Citroen Rally Raid Fuel Pump Secondary Circuit Intermittent
P1259 Holden Hrt Power Door Unlock Circuit Short To Battery
P1259 Toyota Vanguard Passenger Power Window Motor Circuit Short To Ground
P1259 Pontiac Grand Am Exhaust Valve Control Solenoid Circuit Low (Bank 2)
P1259 Cottin-desgouttes 20 Fuel Shutoff Valve Control Circuit Low
P1259 Honda Fcx PRNDL Input #4 Circuit Failure
P1259 Steyr Haflinger Lamp Tail Output Circuit Short To Ground