U0057 Diagnostic Trouble Code

U0057 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 U0057 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
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
Faulty IMRC actuator/sensor

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. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. 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 U0057 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 U0057.

Fortunately, U0057 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0057 Trouble Code For Specific Cars

U0057 Belsize 9 Hp Barometer Pressure Circuit Malfunction
U0057 Chevrolet Silverado EIC Switch-2 Assembly Circuit Short To Ground
U0057 Morgan Aero B-pillar Power Sliding Door Open/Close Switch Input Ckt Short to Gnd
U0057 Ac Cobra ABS Function Enabled Input Circuit Failure
U0057 Rover Ccv Ignition Coil F Primary/Secondary Circuit Malfunction
U0057 Stutz Dv32 Lamp Warning Relay Circuit Short To Ground
U0057 Honda Civic Type-r Pressure Control Solenoid Failed Low