P142B Diagnostic Trouble Code

P142B 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 P142B diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
Reduction in engine performance, especially at low RPM levels

Possible Causes :

Dirty air cleaner element Damaged DPF
A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Look at the plug wires to make sure they are not burnt or laying on the exhaust. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code P142B 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 P142B.

Fortunately, P142B is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P142B Trouble Code For Specific Cars

P142B Caterham C Door Ajar RR Circuit Short To Battery
P142B Mercedes S 550 Air Assisted Injector Control Circuit or Circuit Low
P142B Rover Metro
P142B Pontiac Solstice Flash To Pass Switch Circuit Short To Battery
P142B Prince B Fuel Rail Pressure Sensor Circuit Malfunction
P142B Audi V8 Audio Rear Control Unit is Not Responding
P142B Amc Matador Air Suspension Gate Solenoid Output Circuit Failure