B142D Diagnostic Trouble Code

B142D 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 B142D diagnostic trouble code may include:

Lack of power
Faulty O2 Sensor
Poor 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)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. 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. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code B142D 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 B142D.

Fortunately, B142D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B142D Trouble Code For Specific Cars

B142D Toyota Mr2 Output Speed Sensor Circuit Malfunction
B142D Datsun Laurel HO2S Heater Control Circuit (Bank 2 Sensor 1)
B142D Lada Calina Shift Solenoid A Stuck On
B142D Opel Zafira Door Lock Cylinder Circuit Open
B142D Fageol Fageol Injector Circuit Malfunction - Cylinder 10
B142D Gaz 26 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 3)
B142D Renault 14 Gear 1 Incorrect ratio