Engine/Transmission Speed Sensor Out of Range
The engine or transmission speed sensor signal is outside the expected range.
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 computer is seeing that the speed from the engine or transmission sensor is either too high, too low, or completely missing when it should be a normal range value based on engine load and RPM.
What the computer is actually seeing
The system expects a certain voltage (typically between 0.5V and 4.5V) from speed sensors corresponding to engine RPM; if it deviates too much, it triggers this code.
What a healthy reading looks like
Engine speed typically ranges from 400 RPM (idle) to 4000 RPM (high rev), with signal voltages corresponding accurately to these speeds.
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 at the speed sensor for damage or corrosion. Repair or replace as necessary. If good, proceed to step 2.
- 2Using a multimeter, check the voltage at the speed sensor connector. Voltage should be between 0.5V and 4.5V with the engine running. If voltage is outside range, check for short or open in the wiring or replace sensor if wiring is good.
- 3Inspect the speed sensor itself by removing it and checking for debris or damage. If damaged, replace the speed sensor and clear the code; retest to confirm if issue resolved.
- 4If replacing the sensor, check the data using a scan tool after replacement to ensure the signal is stable and within expected ranges.
Common causes
- Faulty speed sensor
- Wiring issues or broken connectors
- Faulty ECM
- Faulty transmission gear or internal failure
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means it's best to repair soon; it may affect drivability but might not lead to immediate danger.
Will the code come back after clearing?
If the underlying issue isn't fixed, yes, the code is likely to return.
Why does this code seem to pair with others like SPN 100?
These codes often indicate related issues with speed sensor functionality or transmission problems.
Working a real vehicle right now?
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