Transmission Range Selector Switch Circuit Fault
The transmission range selector switch has detected an issue.
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 getting incorrect signals from the transmission range sensor, which tells it what gear the transmission is in. This can happen if the switch is faulty or if there's a wiring problem.
What the computer is actually seeing
The Transmission Control Module (TCM) expects a range of voltages that correspond to different gear positions (e.g., 0V for Park, 1-5V for Drive gears). If it sees out-of-range or inconsistent voltage signals, it triggers this code.
What a healthy reading looks like
Typically, expect around 0V to 5V based on the gear selection. For example, Park should read close to 0V, while Drive may read near 5V.
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 damage or corrosion related to the transmission range selector switch.
- 22. Check the transmission fluid level; it should be between the marks on the dipstick, typically around 150-200°F fluid temperature during the check.
- 33. Use a scan tool to monitor the voltage output from the range sensor; it should vary from 0V in Park to around 5V in Drive.
- 44. If abnormal readings are confirmed, replace the transmission range sensor and retest.
- 55. If the problem persists, inspect the TCM for faults or internal errors.
Common causes
- Faulty transmission range sensor
- Wiring or connector faults
- Faulty TCM (Transmission Control Module)
- Low transmission fluid level
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's best to avoid driving until the issue is resolved since it can affect gear shifting.
Will this code come back after clearing?
If the issue persists and isn't fixed, yes, the code will likely return.
Why does this code appear with other transmission codes?
Transmission components often share wiring and sensors; faults can trigger multiple related codes.
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