P131C Diagnostic Trouble Code

P131C 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 P131C diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

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. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code P131C 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 P131C.

Fortunately, P131C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P131C Trouble Code For Specific Cars

P131C Seat 131 Injector Circuit Malfunction - Cylinder 12
P131C Chrysler Newport Evaporative Emission Control System Vent Control Circuit Shorted
P131C Hudson Rambler Right Front Sensor Circuit Fault
P131C Castagna Vittoria Door Ajar Lamp Circuit Short To Battery
P131C Ford Consul MAF Sensor In Range But Higher Than Expected
P131C Volkswagen Caddy 4 RESCU/VEMS Input Circuit Short to Ground
P131C Suzuki Cappuccino Memory 2 Switch Circuit Short To Ground