Powertrain, generic · Transmission

P0883 TCM Power Input Signal High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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. P0883 means the supply is too high: Ford sets it above 16 V, continuously and with MIL; GM's counterpart P0563 sets at 18 V. Typical triggers are a failed alternator regulator or a jump start with 24 V. Overvoltage endangers the output stages, so the module may switch the solenoids off.

Likely causes

Alternator voltage regulator faulty (overcharging)
Jump start with 24 V or charger in boost mode
Poor battery ground, regulator measures wrongly
Module measurement faulty

Symptoms

  • MIL on
  • Charging warning or unusually bright lights
  • Overvoltage codes in other modules

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–700
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

transmission control moduletransmission relaybatterymodule wiring

Related codes

P0880P0882P0884P0563P0700

References: newtonnet.co.uk, fordservicecontent.com, roushcleantech.com, gsi.ext.gm.com.