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.
1994 Geo Metro Base, 2D Hatchback, StandardFACTORY OEM SERVICE PROCEDURE
Camshaft Position Sensor
- A malfunction in the camshaft position sensor circuit will set diagnostic trouble Code 42. For testing procedures, see TESTS W/CODES article in this section. Use the following procedure to diagnose camshaft position sensor.
- Ensure air gap measures .008-.016" (.2-.4 mm). Adjust as necessary. If air gap is okay, disconnect distributor 2-pin electrical connector. Using an ohmmeter, measure resistance between terminals of distributor connector. Resistance should be 140-180 ohms. If resistance is not as specified, replace camshaft position sensor.
Factory Service Tools
Use the Manual With the Right Hardware
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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.