P156E Diagnostic Trouble Code

P156E 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 P156E diagnostic trouble code may include:

Lack of power
Faulty O2 Sensor
Poor acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

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. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code P156E 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 P156E.

Fortunately, P156E is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P156E Trouble Code For Specific Cars

P156E Volkswagen Multivan Right Rear Center Sensor Circuit Short to Vbat
P156E Acura Tl Iii ABS Inlet Valve Coil LR Circuit Short To Ground
P156E Dacia Duster Ii Fuel Temperature Sensor A Circuit High Input
P156E Hrg 1.5 Litre Ride Control LR Shock Actuator Circuit Short To Battery
P156E Opel Manta Door Ajar Circuit Open
P156E Pontiac Vibe Front Doppler Sensor Circuit Failure
P156E Twombly Cyclecar Power Supply #2 Circuit Short to Ground