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 Aston Martin 15 Air Suspension RF Corner Up Timeout
P2159 Mercedes-benz 240 Air Bag passenger Circuit Open - Loop #2
P2159 Honda Fit Ii PRNDL Reverse Input Open Circuit
P2159 Vauxhall Corsa C Pressure Control Solenoid "C" Intermittent Short
P2159 Land Rover Lr3 Steering VAPS II Circuit Loop Short To Battery
P2159 Pininfarina Spider Evaporative Check Solenoid Circuit Malfunction
P2159 Dacia Nova Fuel Temperature Sensor A Circuit Performance