B2142 Diagnostic Trouble Code

B2142 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 B2142 diagnostic trouble code may include:

Poor fuel economy
Possible spark knock (detonation / pre-ignition)
Misfire
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

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. Look at the plug wires to make sure they are not burnt or laying on the exhaust. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors.

Process Tips

Diagnostic trouble code B2142 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 B2142.

Fortunately, B2142 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2142 Trouble Code For Specific Cars

B2142 Mazda 6 Transmission Transfer Case Contact Plate 'C' Short Circuit To Ground
B2142 Mitsubishi Space Star Ii Aux Heater Overheat Fault
B2142 Zeta Saloon SCP (J1850) Lack of Acknowledgment for Primary Id
B2142 Duesenberg A Illuminated Entry Relay Short To Battery
B2142 Mercedes Slk 250 Air Bag Diagnostic Monitor Ground Circuit Short To Battery
B2142 Austro-daimler Adm Aux Heater Coolant Pump Circuit Open
B2142 Honda Acura Tl Pressure Control Solenoid C Control Circuit / Open