U1736 Diagnostic Trouble Code

U1736 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 U1736 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
Reduction in engine performance, especially at low RPM levels

Possible Causes :

A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Some aftermarket accessories and performance modifications
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 you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs. 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 U1736 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 U1736.

Fortunately, U1736 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U1736 Trouble Code For Specific Cars

U1736 Mazda Eunos TRS Circuit Intermittent Malfunction
U1736 Volkswagen 1500 Rear Cargo Door Unlock Circuit Open
U1736 Chrysler Ccv Engine Overtemp Condition
U1736 Mitsubishi A10 Audio Center Amp is not responding
U1736 Bugatti Type 49 Cylinder 11 Misfire Detected
U1736 Simca 1300 Intake Manifold Runner Control (Stuck Closed)
U1736 Scion Fr-s Injection Pump Fuel Metering Control "B" Low (Cam/Rotor/Injector)