B14C5 Diagnostic Trouble Code

B14C5 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 B14C5 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.
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. 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. 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 B14C5 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 B14C5.

Fortunately, B14C5 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B14C5 Trouble Code For Specific Cars

B14C5 Buick 80 Cylinder 4 Misfire Detected
B14C5 Lotus Exige Traction Control Motor Coherency Fault
B14C5 Porsche Kremer Fuel Pump Secondary Circuit Low
B14C5 Saab Gt Ignition Tamper Circuit Short To Battery
B14C5 Citroen Big Fifteen Front Doppler Sensor Circuit Failure
B14C5 Leblanc Mirabeau TCM Communication Circuit High
B14C5 Volkswagen Type 4 SCP (J1850) Invalid or Missing Data for Brakes