P0792 Code: Intermediate Shaft Speed Sensor A Circuit Range/Performance

What the P0792 code means

Some transmissions, mostly those with six or more speeds and dual-clutch units, have a sensor on an intermediate shaft so the computer can monitor more precisely which clutches are applied.

The sensor generates pulses whose frequency depends on the speed or the quantity being measured. A range fault, the P0792 code, means the sensor is measuring, but measuring wrong, or that there is a real abnormal condition.

Without this signal the computer loses information it needs to control the shifts, and it can switch to limp mode. See the guide to the input/output speed sensors for how they are tested.

This kind of fault is rarely solved with a multimeter, because everything looks right electrically. You have to compare what the part reports with reality: use a pressure gauge, a thermometer, a tachometer, or command the component with the scan tool and see whether the physical result matches the order.

P0792 code symptoms

• Check engine light on.
• Transmission limp mode.

Likely causes of the P0792 code

1. Sensor that is degraded or out of calibration. It gives believable but wrong readings.
2. A real abnormal condition. The system is actually working outside the normal range.
3. High resistance in the connector from corrosion, which shifts the reading.
4. Damaged or blocked port, hose or tone wheel, depending on the type of sensor.

How to diagnose the P0792 code step by step

1. Read the sensor value on the scan tool and compare it with what is expected.
2. Inspect the connector for corrosion, water or loose pins.
3. Check power and ground with the key on: a correct reference and less than 0.1 V of drop on the ground.
4. Measure the signal with the connector plugged in and see whether it changes with the condition.
5. Do the wiggle test on the harness with the scan tool in graphing mode.
6. Check the continuity of each wire up to the computer (under 1 ohm).

How to fix the P0792 code

• Repair the connector or the wiring.
• Replace the sensor if the tests confirm it.
• Correct the real condition, if there is one.
• Clear the codes and verify with a road test.

Technical reference data

• Most are 3-wire Hall effect sensors.
• These are approximate values: check the manufacturer data for your vehicle.

Brand-specific notes

This code appears on Honda and Hyundai transmissions and on some dual-clutch units.

P0792 on Honda

It shows up on Honda transmissions that carry an intermediate shaft speed sensor.

P0792 on Hyundai

It also appears on Hyundai transmissions, where the same connector and wiring checks apply before the sensor is replaced.

P0792 on Dual-Clutch Transmissions

Some dual-clutch units use this sensor to monitor which clutches are applied, so a bad reading here can send the transmission into limp mode.

Frequently asked questions about P0792