Fault Family System: Powertrain (P-Codes) 29 SAE Codes

Trans Fluid Pump Control Module

Diagnostic & Technical Explanation

Code P0B0D sets when the electric transmission fluid pump's control module fails an internal self-test or loses communication on its network segment — a smaller, dedicated controller for the auxiliary hydraulic pump rather than the vehicle's central powertrain module. The most common physical causes are a corroded or loose power/ground connection at this module, a chafed wiring segment on its dedicated communication line, and an internal module hardware failure. Because this controller only manages the fluid pump, a fault here does not by itself indicate a fault in the transmission's main control system.

These 29 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 29 times.

Codes in this family (29)

Code	Definition	Repair coverage
P0B0D	Electric/Auxiliary Transmission Fluid Pump Motor Control Module	3 ranked fixes
P0C1B	Electric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Too High	3 ranked fixes
P0C1C	Electric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit	3 ranked fixes
P0C1D	Electric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit Range/Performance	3 ranked fixes
P0C1E	Electric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit Low	3 ranked fixes
P0C1F	Electric/Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit High	3 ranked fixes
P0C23	Electric/Auxiliary Transmission Fluid Pump Control Module Circuit/Open	3 ranked fixes
P0C24	Electric/Auxiliary Transmission Fluid Pump Control Module Circuit Low	3 ranked fixes
P0C25	Electric/Auxiliary Transmission Fluid Pump Control Module Circuit High	3 ranked fixes
P0C29	Electric/Auxiliary Transmission Fluid Pump A Driver Circuit Performance	3 ranked fixes
P0C2A	Electric/Auxiliary Transmission Fluid Pump A Motor Stalled	3 ranked fixes
P0C2B	Electric/Auxiliary Transmission Fluid Pump Control Module Feedback Signal	3 ranked fixes
P0C2C	Electric/Auxiliary Transmission Fluid Pump Control Module Feedback Signal Range/Performance	3 ranked fixes
P0C2D	Electric/Auxiliary Transmission Fluid Pump Control Module Feedback Signal Low	3 ranked fixes
P0C2E	Electric/Auxiliary Transmission Fluid Pump Control Module Feedback Signal High	3 ranked fixes
P277B	Electric/Auxiliary Transmission Fluid Pump B Driver Circuit Performance	3 ranked fixes
P277C	Electric/Auxiliary Transmission Fluid Pump B Motor Stalled	3 ranked fixes
P2796	Electric/Auxiliary Transmission Fluid Pump A Control Circuit/Open	3 ranked fixes
P2797	Electric/Auxiliary Transmission Fluid Pump A Performance/Stuck Off	3 ranked fixes
P2798	Electric/Auxiliary Transmission Fluid Pump A Control Circuit Low	3 ranked fixes
P2799	Electric/Auxiliary Transmission Fluid Pump A Control Circuit High	3 ranked fixes
P27A1	Electric/Auxiliary Transmission Fluid Pump A Stuck On	3 ranked fixes
P27A2	Electric/Auxiliary Transmission Fluid Pump B Control Circuit/Open	3 ranked fixes
P27A3	Electric/Auxiliary Transmission Fluid Pump B Performance/Stuck Off	3 ranked fixes
P27A4	Electric/Auxiliary Transmission Fluid Pump B Control Circuit Low	3 ranked fixes
P27A5	Electric/Auxiliary Transmission Fluid Pump B Control Circuit High	3 ranked fixes
P27A6	Electric/Auxiliary Transmission Fluid Pump B Stuck On	3 ranked fixes
P28ED	Electric/Auxiliary Transmission Fluid Pump B Overspeed	3 ranked fixes
P28EE	Electric/Auxiliary Transmission Fluid Pump B Underspeed	3 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:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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