P0791
PowertrainTransmissionmoderate severityIntermediate Shaft Speed Sensor Circuit
What P0791 Means
The intermediate shaft speed sensor signal is out of range or missing. This affects the transmission's ability to accurately time shifts.
Symptoms
- Harsh or erratic shifting
- Transmission warning light on
- Speedometer may read incorrectly
Common Causes
- Faulty intermediate shaft speed sensor
- Damaged sensor wiring or connector
- Metal debris on sensor tip
- Faulty transmission control module
Diagnostic Steps
- Scan for related transmission codes
- Inspect sensor connector and wiring
- Check sensor resistance against spec
- Test signal output with scope while driving
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