P0883
TCM Power Input Signal High
Transmission control module power
Generic OBD-II
Medium
What it means
P0883 means the transmission control module (TCM) is seeing a power input voltage that's too high. The engine keeps running, but the TCM needs a stable supply to shift correctly, so an overvoltage or wiring fault can make the transmission shift poorly or fall back to limp mode. A charging-system problem is a common root cause and worth checking before condemning the module.
Medium
Can I keep driving? The engine runs; the transmission may shift poorly or drop into limp mode until the module's power supply is corrected.
Common symptoms
What you'll notice
- Check-engine light on
- Poor or erratic shifting
- Transmission may enter limp mode
- Reduced power while in limp mode
Common causes
Most likely first
- Charging-system overvoltage feeding the TCM (check first)Likely
- Wiring or connector fault raising the TCM power input signalCommon
- Loose or corroded connections in the TCM power circuitCommon
- Faulty transmission control module (TCM)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and test battery and charging-system voltage to rule out overvoltage.
- Inspect the TCM power feed wiring, connectors, and grounds.
- Measure the power input signal voltage against specification.
- Repair the wiring or connectors; if the module is confirmed faulty, replace the TCM.
- Clear the code and re-test.
FAQ
Quick answers
Is it safe to drive with P0883?+
The engine runs, but the transmission may limp or shift poorly. Short trips are usually okay; have the charging system and TCM power circuit checked soon.
Can I just clear P0883?+
It clears, but returns until the overvoltage or wiring fault feeding the TCM is fixed.
Related codes
Often seen with P0883
Read & clear P0883 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX