P2159 Diagnostic Trouble Code

P2159 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 P2159 diagnostic trouble code may include:

Cherry red hot catalytic converter
Poor acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Reduction in engine performance, especially at low RPM levels

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.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. 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. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.

Process Tips

Diagnostic trouble code P2159 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 P2159.

Fortunately, P2159 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P2159 Trouble Code For Specific Cars

P2159 Wartburg 1.3
P2159 Acura Loctite ABS Hydraulic Pump Motor Circuit Short To Battery
P2159 Gaz 32 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
P2159 Holden Barina Pedal Forward / Rearward Potentiometer Feedback Circuit Short to Battery
P2159 Suzuki Sc Mirror Driver Left Circuit Failure
P2159 Delahaye 148 Hydraulic Pressure Sensor Circuit
P2159 Honda N Iii PWM Input Circuit Failure