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.
2000 Saturn LS1 L4-2.2L VIN FFACTORY OEM SERVICE PROCEDURE
Crankshaft Relearn Procedure
IMPORTANT: Anytime a replacement PCM is installed the PCM must relearn the crankshaft notches.
When a replacement PCM is installed, or crankshaft position sensor or crankshaft or engine has been replaced, follow these procedures to relearn crankshaft notches:
1. Using Scan tool select "Crankshaft Pos. Variation Learn" under special functions menu.
2. Follow instructions as given on Scan tool.
IMPORTANT: This procedure will not be initiated if any misfire is detected. If misfire DTCs are present, refer to "Misfire Diagnosis" section prior to attempting to relearn crankshaft notches.
When a replacement PCM is installed, or crankshaft position sensor or crankshaft or engine has been replaced, follow these procedures to relearn crankshaft notches:
1. Using Scan tool select "Crankshaft Pos. Variation Learn" under special functions menu.
2. Follow instructions as given on Scan tool.
IMPORTANT: This procedure will not be initiated if any misfire is detected. If misfire DTCs are present, refer to "Misfire Diagnosis" section prior to attempting to relearn crankshaft notches.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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