P2BAD Diagnostic Trouble Code

P2BAD 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 P2BAD diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
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.
Some aftermarket accessories and performance modifications

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. 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 P2BAD 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 P2BAD.

Fortunately, P2BAD is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P2BAD Trouble Code For Specific Cars

P2BAD Honda City Pressure Control Solenoid C Stuck On
P2BAD Cadillac Seville Dim Panel Increase Input Circuit Open
P2BAD Jeep Compass Seat Driver Rear Up Circuit Short To Ground
P2BAD Saab Aero-x Ignition Tamper Circuit Open
P2BAD Mercedes Cls 350 ABS Outlet Valve Coil RF Circuit Short To Battery
P2BAD Lamborghini Gallardo Lp560 Shift/Timing Solenoid Low
P2BAD Datsun 280 HO2S Heater Control C ircuit (Bank 1 Sensor 2)