What Does P0882 Mean?
The TCM has detected that its power input signal voltage is below the minimum acceptable threshold. Low voltage to the TCM compromises its ability to drive shift solenoids and control hydraulic pressures. The transmission may enter a default or limp mode to protect itself from damage caused by uncontrolled shifting.
Safety Warning
The transmission may be stuck in limp mode or fail to shift entirely. Driving is limited to low-speed, emergency situations. Tow the vehicle if no forward gears are available.
Common Causes
30%
Corroded or loose TCM power feed connection
25%
Blown TCM fuse or damaged fusible link
20%
Failed or intermittent TCM power relay
15%
Severely discharged or failing battery
10%
Damaged power feed wiring (open or high resistance)
Diagnostic Steps
1
Measure voltage directly at the TCM power input pin with key on, engine running — if significantly below charging voltage, the feed circuit has an issue.
2
Check the TCM fuse with a test light or multimeter — a blown fuse indicates a short circuit that must be found before replacement.
3
Perform a voltage drop test from the battery positive terminal to the TCM power pin — more than 0.5V indicates excessive resistance.
4
Inspect the TCM connector for pushed-back pins, green corrosion, or melted terminals indicating a poor connection.
5
Test the TCM power relay operation and verify proper voltage on both the control and load sides.
Estimated Repair Cost
$30 - $700
Parts + labor, varies by vehicle and location
The TCM has detected that its power input signal voltage is below the minimum acceptable threshold. Low voltage to the TCM compromises its ability to drive shift solenoids and control hydraulic pressures. The transmission may enter a default or limp mode to protect itself from damage caused by uncon...
The most common cause of P0882 (TCM Power Input Signal Low) is: Corroded or loose TCM power feed connection
Typical repair costs for P0882 range from $30 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The transmission may be stuck in limp mode or fail to shift entirely. Driving is limited to low-speed, emergency situations. Tow the vehicle if no forward gears are available.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0882 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission Control Module Power Supply
Difficulty
Type
Generic (SAE)
Recommended Tools
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