Transmission Component Slipping
The transmission control module has detected that a component within the transmission is slipping.
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)
When the transmission is supposed to be engaging gears, it isn’t catching correctly. This can cause it to feel like it’s revving higher without going faster, often because of internal wear or issues.
What the computer is actually seeing
The TCM monitors input from various sensors and modules, looking for expected RPMs and torque outputs based on throttle position and vehicle speed. When it detects that the RPMs are higher than expected for the current gear and throttle position, it triggers a slipping code.
What a healthy reading looks like
At idle, the transmission fluid pressure should be around 50-70 PSI. In gear at full throttle, fluid pressures should be above 100 PSI while engaging. The TCM expects to see a stable RPM drop of 200-400 RPM during gear shifts.
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. Check the transmission fluid level and condition. Low or dirty fluid can cause slipping. Decision: If low, refill and re-check. If dirty, replace fluid and filter.
- 22. Inspect wiring and connector to the TCM for any signs of wear or damage. Decision: If damaged, repair/replace wiring or connector. If okay, proceed to the next step.
- 33. Connect a scan tool and check for any related codes. Look at input/output speed sensor readings. Decision: If there are additional transmission-related codes, troubleshoot those.
- 44. Test the input and output speed sensors with a multimeter. Generally expect 0-5 volts at rest and varying voltages while driving. Decision: If readings are outside normal range, replace the sensor.
- 55. If no signs of issues found in previous steps, consider internal transmission issues such as worn clutches. A further inspection or rebuild may be necessary.
Common causes
- Low transmission fluid level
- Worn clutches or bands in the transmission
- Faulty transmission control module (TCM)
- Electrical issue such as a bad connector or wiring
- Faulty input/output speed sensors
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive long distances. Slipping can cause further transmission damage.
Will this code come back?
If the underlying issue isn't fixed, yes, it will generally return.
Why does this code appear with other codes?
Transmission issues often have multiple symptoms; other codes can indicate related faults in sensors or control systems.
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