P0882: TCM Power Input Signal Low

The TCM power input codes watch the supply voltage of the gearbox module or of its solenoid supply. Without a proper supply all solenoids go dead and the gearbox falls back to its hydraulic emergency gear with maximum line pressure: a fixed gear, harsh engagement, no shifting. Ford's external gearbox modules check a window of 9 to 16 V; GM reports the same under P0562/P0563. P0882 means the supply is too low: Ford sets it below 9 V, continuously and with MIL. Chrysler's RFE, RLE and TE automatics test it when the key goes to run: if the module reads less than 3 V at the transmission control relay outputs while commanding the relay on, the code sets and the solenoids stay dead.

Medium severity. Can I keep driving?It depends on the symptoms. If the car is running normally you can go to a repair shop; if it goes into limp mode, drive as little as possible.

Symptoms

MIL on
Limp mode in a fixed gear, no shifting
Torque converter clutch stays open

Most likely causes

Weak battery or alternator not charging
Transmission relay, fuse or fuse box module faulty (Chrysler)
Corroded ground or supply wire, connector at the module
Module faulty

What to check, in order

Start with the simplest. You can tick off each step.

Check the battery and grounds
With the connector unplugged, check whether the signal wire is making contact with ground.
Clear the code and see if it returns
If it is a reference voltage code, disconnect sensors one at a time and see if the voltage recovers
Check whether a software update is available
Do not replace the control module without a full diagnosis

Good to know

Repair difficulty: medium
It can trigger limp mode.
It affects emissions.

What each character of P0882 means

P: Powertrain: engine and transmission
0: Generic code: same on every make
8: Transmission
82: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0882?

It depends on the symptoms. If the car is running normally you can go to a repair shop; if it goes into limp mode, drive as little as possible.

What causes code P0882?

The most common causes are: weak battery or alternator not charging; transmission relay, fuse or fuse box module faulty (Chrysler); corroded ground or supply wire, connector at the module.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.