U251U Oldsmobile Vista Cruiser OBD Code

OBD/2 U251U error code description and symptoms.

Variable Cam Timing Over-advanced (Bank 1) The comprehensive component monitor (CCM) monitors the VCT position for an over-advanced camshaft timing.
The test fails when the camshaft timing exceeds a maximum calibrated value or remains in an advanced position. Cam timing improperly set No oil flow to the VCT piston chamber Low oil pressure VCT solenoid valve stuck closed Camshaft advance mechanism binding (VCT unit) U251U DTC is a check of the VCT unit.

At this point we are assuming that the fuses and relays are good. You will need to locate the PCM/TCM and the power input signal circuit using your vehicle information source. Unplug the connector from the PCM/TCM, place the ignition switch in the ON position, and probe the appropriate circuit with the positive test lead of the DVOM.

U251U Oldsmobile Vista Cruiser Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine U251U light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If air suspension rr air spring/shock solenoid output circuit short to ground so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the air suspension rr air spring/shock solenoid output circuit short to ground.

Common Causes of Oldsmobile Vista Cruiser U251U OBD2 Code

A common cause of code U251U is the failure of Air Suspension RR Air Spring/Shock Solenoid Output Circuit Short To Ground, but there are several other possible causes as well, such as ;

Camshaft advance mechanism binding (VCT unit)
Continuous oil flow to the VCT piston chamber
Incorrect Positive Crankcase Ventilation (PCV) hose connection
Variable Camshaft Timing (VCT) position circuit is open or shorted

U251U is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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U251U Oldsmobile Vista Cruiser OBD Code

U251U Oldsmobile Vista Cruiser Error Code Repair Process :

Common Causes of Oldsmobile Vista Cruiser U251U OBD2 Code

U251U code for other Oldsmobile cars