U0690 Buick 90 OBD Code

OBD/2 U0690 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) U0690 DTC is a check of the VCT unit.

To check for an open circuit, trace along the length of the transmission control circuit, checking for breaks in the wiring. Repair any broken wiring and make sure all connectors are fully seated and locked.Pay close attention to connectors, looking for corrosion, bent or broken pins, or moisture in the connector. Repair any connector issues even if they are not specifically part of the transmission control circuit as they may serve a function in providing power to the transmission control circuit.

U0690 Buick 90 Error Code Repair Process :

If your variant selection check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system U0690 and engine control unit are in charge of monitoring a bunch of different variant selection, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Buick 90 U0690 OBD2 Code

A common cause of code U0690 is the failure of Variant Selection, but there are several other possible causes as well, such as ;

Camshaft advance mechanism binding (VCT unit)
Faulty ignition coil (s)
Fuel injectors may be faulty
Dirty Oil

U0690 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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U0690 Buick 90 OBD Code

U0690 Buick 90 Error Code Repair Process :

Common Causes of Buick 90 U0690 OBD2 Code

U0690 code for other Buick cars