Transmission Temperature Sensor A
Fault related to the transmission temperature sensor A input.
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What it means (plain English)
The transmission temperature sensor A monitors how hot the transmission fluid is. If it's faulty or the wiring is bad, the computer gets incorrect temperature readings.
What the computer is actually seeing
The engine control unit (ECU) sees a transmission temperature reading that is outside the expected range, indicating a potential issue with transmission overheating or sensor failure.
What a healthy reading looks like
Transmission fluid temperature should normally be between 175°F and 220°F (79°C - 104°C).
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 transmission fluid level and condition. It should be clean and at proper levels. If fluid is low or dirty, address that first.
- 2Inspect wiring and connectors for the temperature sensor A. Look for frays, corrosion, or loose connections. Repair as needed.
- 3Using a scan tool, check for other related fault codes. If SPN 572 appears with additional codes like SPN 578, investigate their causes too.
- 4Use a multimeter to test the resistance of the transmission temperature sensor A. It should read between 1,000 to 6,000 ohms at room temperature (68°F). If out of range, replace the sensor. Test the circuit continuity back to the ECU.
Common causes
- Bad transmission temperature sensor
- Wiring issues or poor connections
- Fluid contamination or low fluid levels
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; you can drive but should fix it soon to protect your transmission.
Will this fault come back after clearing codes?
It may return if the underlying issue (sensor or wiring) isn't fixed.
Why does this fault pair with a specific SPN?
It usually pairs with related codes indicating either wiring issues or additional sensor faults.
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