P111B Diagnostic Trouble Code

P111B 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 P111B diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Diminished fuel efficiency

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 :

Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector.

Process Tips

Diagnostic trouble code P111B 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 P111B.

Fortunately, P111B is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P111B Trouble Code For Specific Cars

P111B Chevrolet Trax Engine Coolant Level Lamp Circuit Short to Ground
P111B Ferrari C62 Interior Fan Control Circuit Open
P111B Maxwell Model A Transmission Range Sensor Circuit High Input
P111B Alfa Romeo 2000 ABS Pump Switch Circuit Failure
P111B Ferrari 458 Intake Manifold Runner Control (Bank 1) Stuck Open
P111B Oldsmobile Custom Cylinder 7 Misfire Detected
P111B Volvo V70