P135D Diagnostic Trouble Code

P135D 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 P135D diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly

Possible Causes :

Defective ECU strategies or components will prevent proper regeneration
The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

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. If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code P135D 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 P135D.

Fortunately, P135D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P135D Trouble Code For Specific Cars

P135D Mg Zr Ambient Air Temperature Sensor Range/Performance
P135D Honda Acura Tl Pressure Control Solenoid C Control Circuit / Open
P135D Lotus Xi Traction Control Output Circuit Malfunction
P135D Toyota Sera Park/Neutral Switch Circuit Open
P135D Peugeot Touareg Engine Oil Pressure Sensor/Switch Range/Performance
P135D Fiat Grand Break Lamp Tail Output Circuit Short To Battery
P135D Lamborghini Diablo Shift Time Too Long