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.
Circuit Description
By using the G-sensor, the PCM can determine if changes in crankshaft speed are due to engine misfire or are educed by driveline condition. If the G-sensor detects a rough road condition, the PCM misfire detection diagnostic will be deactivated. At rest, G-sensor output is 2.5 volts. During operation, G-sensor output can vary between .5-4.5 volts.
Conditions required to set DTC are:
- Engine is running.
- Vehicle is not moving.
- G-sensor signal indicates greater than 2.5 volts or less than 1.5 volts for one minute.
NO RELATED
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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.