MechanicDB
Fault Family System: Powertrain (P-Codes) 13 SAE Codes

TCM Power Supply Circuit

Diagnostic & Technical Explanation
Code P0880 (TCM Power Input Signal) sets when the TCM's own power-supply monitoring finds its main power input, or the relay/sense circuit that supplies it, out of range or intermittent. Causes are a failed TCM power relay, a blown fuse, a corroded power/ground connection at the TCM connector, or damaged supply wiring.

These 13 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 13 times.

Codes in this family (13)

CodeDefinitionRepair coverage
P0880TCM Power Input Signal3 ranked fixes
P0881TCM Power Input Signal Range/Performance3 ranked fixes
P0882TCM Power Input Signal Low3 ranked fixes
P0883TCM Power Input Signal High3 ranked fixes
P0884TCM Power Input Signal Intermittent3 ranked fixes
P0885TCM Power Relay Control Circuit/Open3 ranked fixes
P0886TCM Power Relay Control Circuit Low3 ranked fixes
P0887TCM Power Relay Control Circuit High3 ranked fixes
P0888TCM Power Relay Sense Circuit3 ranked fixes
P0889TCM Power Relay Sense Circuit Range/Performance3 ranked fixes
P0890TCM Power Relay Sense Circuit Low3 ranked fixes
P0891TCM Power Relay Sense Circuit High3 ranked fixes
P0892TCM Power Relay Sense Circuit Intermittent3 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here: