We selected several models to see obd2 solutions click and view it. You can view according P0171 DTC for your car model. For example, if the driver selects manual mode and selects 3rd gear on an automatic transmission, the TCM may monitor speed sensors to detect clutch and brake slippage. The TCM also uses the gate select position switch to monitor transmission operation. On manual transmissions, the GSP switch informs the TCM which gear the driver is selecting, and may function as a neutral safety switch, depending on system design. On some transmissions, such as automated manual transmissions or automatic transmissions with manual mode, the GSP switch lets the TCM know whether or not the driver has selected automatic or manual function. Looking around the forums, it seemed like cleaning the MAF sensor was the consensus, so I tried that. 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) P0171 DTC is a check of the VCT unit. It started with stumbling/stuttering issues at around 2000-2500rpm while cruising, light throttle, maintaining speed with traffic flow. The test fails when the camshaft timing exceeds a maximum calibrated value or remains in an advanced position. Variable Cam Timing Over-advanced (Bank 1) The comprehensive component monitor (CCM) monitors the VCT position for an over-advanced camshaft timing. P0171 Mazda 600 OBD Code OBD/2 P0171 error code description and symptoms.
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