With Scan Tool
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition - On / Vehicle - In Service Mode
- Verify there are no other DTCs set, except for DTC P0300-P0308, P0315.
- If any other DTCs are set
- Go to next step: If no other DTCs are set
- Select:Module Diagnostics
- Select:Engine Control Module
- Select:Configuration/Reset Functions
- Select:Learn Functions
- Select:Crankshaft Position Variation Learn
- Follow the instructions on the scan tool.
Verify the scan tool procedure was successful.
- If the procedure was not successful and first time here
- Ignition/Vehicle - Off
- Verify the following conditions do not exist:
- B26 Crankshaft Position Sensor & Reluctor Ring - Foreign material passing between the components/Incorrect air gap
- Battery Voltage - Low
- Crankshaft Bearing - Worn
- Crankshaft - Excessive runout/Visible Damage
- Reluctor Ring - Misaligned/Visible Damage
- Signal circuit@B26 Crankshaft Position Sensor - Electromagnetic Interference
- If a condition exists - Repair or replace as necessary
- If no condition exists - Repeat step 1
- If the procedure was not successful and performed 4 times or less
Repeat step 6
- If the procedure was not successful and performed 5 times
Replace the component:K20 Engine Control Module
- Go to next step: If the procedure was successful
- All OK.