Turbine Speed Sensor (TSS) Voltage
Indicates a fault with the turbine speed sensor's voltage signal.
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 the rotation speed of the turbine in the transmission, and if it isn't sending the right voltage signals, the computer thinks there's a problem.
What the computer is actually seeing
The Engine Control Module (ECM) expects a voltage signal from the turbine speed sensor that varies based on the turbine's rotation, typically ranging between 0.5 to 4.5 volts. If the signal is below 0.5 volts or goes above 4.5 volts, the ECM will trigger a fault code.
What a healthy reading looks like
0.5V to 4.5V at the turbine speed sensor based on speed
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 any signs of damage or corrosion. Repair as needed. Decision: If wiring is good, move to Step 2.
- 2Using a multimeter, check for voltage at the turbine speed sensor connector with the key on, engine off. Expected voltage is 0.5V to 4.5V. Decision: If voltage is out of range, proceed to Step 3, if in range, the issue may be in the ECM.
- 3Test the resistance of the turbine speed sensor per manufacturer specifications. If resistance is out of spec, the sensor is faulty. Decision: Replace the sensor if faulty, if in spec, investigate ECM issues.
Common causes
- Damaged wiring to the turbine speed sensor
- Faulty turbine speed sensor
- Corrosion or poor connection at the sensor connector
- ECM issues affecting sensor reading
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive the vehicle with this code?
It's not recommended to drive the vehicle extensively, as it may affect shifting and could lead to further transmission issues.
Will this code come back after I clear it?
It could come back if the underlying issue is not resolved, like a bad sensor or damaged wiring.
Why do I see this code with SPN 1054?
SPN 1054 is often related as it indicates issues with the transmission output speed sensor, which works in conjunction with the turbine speed sensor.
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