U0136 Diagnostic Trouble Code

U0136 is a kind of OBD-II Diagnostic U-Network 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 U0136 diagnostic trouble code may include:

Poor acceleration
Cherry red hot catalytic converter
Possible spark knock (detonation / pre-ignition)
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.
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

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. 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. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition.

Process Tips

Diagnostic trouble code U0136 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 U0136.

Fortunately, U0136 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0136 Trouble Code For Specific Cars

U0136 Bmw Breyton Climate Control On/Off Switch Circuit Failure
U0136 Toyota Allion No Movement Detected After an Unlatch During Power Open
U0136 Jowett Javelin Seat Headrest Feedback Potentiometer Circuit Short to Battery
U0136 Mazda 1800 Transmission Transfer Case Contact Plate 'B' Circuit Failure
U0136 Toyota Gt86 Oil Change Reset Button Circuit Short To Battery
U0136 Adler 10 ABS Inlet Valve Coil RF Circuit Short To Battery
U0136 Daihatsu Sirion Glow Plug Circuit Low Input (Bank #1)