G-Sensor Voltage Low Rough Road Sensor
Table of contents
P1392 ISUZU Possible Causes
- Faulty G-Sensor
- G-Sensor harness is open or shorted
- G-Sensor circuit poor electrical connection
How do I fix code P1392 ISUZU?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- Check for poor connections at PCM. Inspect wiring harness for damage by, moving connectors and wiring harnesses while observing any change on scan tool G-sensor display. Since the G-sensor shares PCM reference and ground terminals with the MAP sensor, a damaged MAP harness or sensor could cause a G-sensor DTC to be set.
Cost of diagnosing the P1392 ISUZU code
The cost of diagnosing the P1392 ISUZU code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1392 ISUZU Description
By using the G-sensor, the PCM can determine if changes in crankshaft speed are due to engine misfire or are educed by the driveline condition. If the G-sensor detects a rough road condition, the PCM misfire detection diagnostic will be deactivated. At rest, the G-sensor output is 2.5 volts. During operation, G-sensor output can vary between .5-4.5 volts.