Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 32 (ENGINE CONTROLS/FUEL - 1.4L (LUV) - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSCRANKSHAFT POSITION VARIATION LEARNWITH SCAN TOOL
2019 Chevrolet Tahoe LS, 4WD, Gas/Ethanol
With Scan Tool
2019 Chevrolet Tahoe LS, 4WD, Gas/EthanolSECTION With Scan Tool
WARNING: This page is about a different car, the 2018 Chevrolet Sonic. 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.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.