Turbine Speed Sensor Failure
The turbine speed sensor is not producing a valid signal for the transmission system.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The turbine speed sensor measures how fast the turbine in the transmission is spinning. If it fails or sends a wrong signal, the computer can't tell how the transmission is performing, which can affect shifting and overall drivability.
What the computer is actually seeing
The computer expects to see a varying voltage signal from the turbine speed sensor. This signal should typically be between 0.5V to 5V, depending on the turbine's speed. A steady or absent signal indicates a failure.
What a healthy reading looks like
Signal voltage should be between 0.5V and 5V depending on the turbine speed, with a normal frequency indicative of the operational range.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the wiring and connectors for the turbine speed sensor for any signs of damage or corrosion.
- 2Verify the transmission fluid level is at the manufacturer’s specified level; low fluid can cause erratic sensor readings.
- 3Measure the sensor output voltage with the engine running. A normal reading should vary between 0.5V and 5V based on turbine speed. If there’s no output, proceed to the next step.
- 4Inspect the sensor itself for any physical damage. If the sensor is damaged, replace it and retest.
- 5If voltage is within range but the issue persists, check the TCM for faults or replace it if necessary.
Common causes
- Faulty turbine speed sensor
- Damaged wiring or connectors
- Transmission fluid level low
- Faulty transmission control module (TCM)
- Poor electrical connection
Typical repair cost
$$-$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix it soon as it can affect shifting and cause transmission issues.
Will this code come back after clearing?
If the underlying issue isn't addressed, yes, it will likely reappear.
Why do I see this code when there are other codes present?
This code can often pair with other transmission-related codes, indicating a broader issue with the transmission system.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →