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.
1993 Nissan-Datsun Sentra SE-R, AutomaticFACTORY OEM SERVICE PROCEDURE
Fail-Safe System Diagnosis (Maxima VG30E)
- Turn ignition on. Perform MODE III (SELF-DIAGNOSTICS) under DUAL LED SYSTEM in TESTS W/CODES article. If Code 11 is present, check crankshaft position sensor. See CRANKSHAFT POSITION SENSOR under ENGINE SENSORS & SWITCHES . After making repairs, start engine to ensure CHECK ENGINE light is off.
- If Code 11 is not present but CHECK ENGINE light is on, try to enter MODE III again. If unable to enter MODE III, replace ECM. If MODE III is entered and Code 11 is not present, check for short in CHECK ENGINE light circuit causing light to stay on.
Factory Service Tools
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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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