Transmission Speed Sensor A
There’s an issue with the Transmission Speed Sensor A readings.
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 Transmission Speed Sensor A measures the speed of the transmission output shaft. If it's faulty or has poor connections, it can't send the right speed info to the engine control module (ECM). This can cause shifting problems and may trigger a warning light.
What the computer is actually seeing
The ECM expects to see a stable voltage signal from the Transmission Speed Sensor A, typically between 0.5 to 4.5 volts. If it detects erratic signals, it triggers SPN 6113.
What a healthy reading looks like
0.5 to 4.5 volts from sensor when vehicle is in motion, with a predictable increase in voltage corresponding to 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.
- 11. Inspect the wiring and connectors for the Transmission Speed Sensor A. Look for frayed wires or corrosion.
- 22. Check the transmission fluid level. If low, fill to the manufacturer's recommended level, then retest.
- 33. Measure the voltage at the sensor with the vehicle in motion. It should read between 0.5 to 4.5 volts.
- 44. If voltage is out of range or unstable, replace the Transmission Speed Sensor A.
- 55. If the sensor is new and the wiring is good but the code reappears, check the transmission control module (TCM) for faults.
Common causes
- Faulty Transmission Speed Sensor A
- Bad wiring or connectors to the sensor
- Low transmission fluid levels
- Malfunctioning ECM
- Intermittent electrical issues
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I keep driving with this code?
It's not advised, as it can cause shifting issues and may lead to additional transmission damage.
Will this code clear itself?
It may clear if the sensor issue is intermittent, but it's best to diagnose and fix the underlying problem.
Why does this code appear at the same time as other SPN codes?
Transmission issues often create multiple error codes as they affect overall system performance.
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