What Does P0C2D Mean?
DTC P0C2D indicates the feedback signal from the auxiliary transmission fluid pump control module is reading below the minimum expected voltage threshold. A low feedback signal can mean the sensor is shorted to ground, the wiring has excessive resistance dropping the voltage, or the pump is not running and therefore not generating a proper feedback response.
Common Causes
30%
Short-to-ground in the feedback signal wiring
25%
Failed feedback sensor within the pump module pulled low internally
20%
Corroded or high-resistance ground connection affecting signal return path
15%
Pump motor not actually running despite being commanded, resulting in no feedback
10%
Damaged connector pin on the feedback circuit not making full contact
Diagnostic Steps
1
Measure the feedback signal voltage at the TCM/PCM connector while the pump is commanded on — confirm it is below specification.
2
Disconnect the pump control module and check if the low voltage persists on the harness side, indicating a wiring short-to-ground.
3
Inspect the feedback signal wire for damaged insulation, particularly where it routes near metal brackets or transmission housing.
4
Verify the pump motor is actually running when commanded — if not, address motor faults first (check P0C2A).
5
If wiring is clean and the pump runs, replace the control module feedback sensor/module assembly.
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
DTC P0C2D indicates the feedback signal from the auxiliary transmission fluid pump control module is reading below the minimum expected voltage threshold. A low feedback signal can mean the sensor is shorted to ground, the wiring has excessive resistance dropping the voltage, or the pump is not runn...
The most common cause of P0C2D (Auxiliary Transmission Fluid Pump Control Module Feedback Signal Low) is: Short-to-ground in the feedback signal wiring
Typical repair costs for P0C2D range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
A low feedback signal causes the control system to lose confidence in pump operation status. The TCM may disable auxiliary pump functions or enter a protective mode that limits hybrid functionality. Repair to restore full hybrid/transmission operation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0C2D to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission / Hybrid Drivetrain
Difficulty
Type
Generic (SAE)
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