B143F Diagnostic Trouble Code

B143F is a kind of OBD-II Diagnostic B-Body 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 B143F 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.
Engine surge

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

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. If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve. 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 B143F 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 B143F.

Fortunately, B143F is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B143F Trouble Code For Specific Cars

B143F Jaguar Xk8 Seat Driver Occupied Switch Circuit Short To Battery
B143F Stoewer Stoewer Lamp Turn Signal Left Circuit Short To Battery
B143F Tvr Type S Power Steering Pressure Sensor Circuit Malfunction
B143F Suzuki Lj 50 Mirror Driver Horizontal Feedback Potentiometer Circuit Short to Ground
B143F Talbot Sunbeam Mirror Passenger Right Circuit Failure
B143F Dodge Conquest Ignition Coil D Secondary Circuit Malfunction
B143F Renault Megane 2 Heated Backlite Input Circuit Short To Battery