Circuit/System Verification
WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Cadillac Escalade ESV, and 2018 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition - On / Vehicle - In Service Mode
- Verify DTC P0651, P2805 is not set.
- If DTC P0651 is set
- If DTC P2805 is set
Replace the component: B303 Transmission Range Sensor
- Go to next step: If DTC P0651, P2805 is not set
- Verify the condition does not exist:Incorrect adjustment - Refer to Automatic Transmission Range Selector Lever Cable Adjustment
- If a condition exists
Repair or replace as necessary.
- Go to next step: If no condition exists
- If a condition exists
- Operate the component:S3 Transmission Shift Lever - Select each position
Verify the scan tool parameter:Transmission Range Sensor 1, 2 = The value should be within the range listed in the table:Transmission Range Sensor Duty Cycles
- If not in the specified range
Refer to Circuit/System Testing
- Go to next step: If in the specified range
- If not in the specified range
- Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Verify the DTC does not set.
- If the DTC sets
Refer to Circuit/System Testing below
- Go to next step: If the DTC is not set
- If the DTC sets
- All OK.