What Does P0C2C Mean?
DTC P0C2C indicates the feedback signal from the auxiliary transmission fluid pump control module is out of its expected range or not performing correctly relative to commanded operation. The signal is present but does not correlate properly with the pump's commanded speed or state, suggesting a calibration issue, degraded sensor, or mechanical pump problem.
Common Causes
30%
Degraded feedback sensor within the pump control module producing inaccurate readings
25%
Pump motor speed not matching commanded speed due to mechanical wear
20%
High resistance in feedback signal wiring causing signal attenuation
15%
Intermittent electrical connection on the feedback circuit
10%
Control module software calibration mismatch after component replacement
Diagnostic Steps
1
Monitor the feedback signal value on a scan tool while commanding various pump speeds to identify where the deviation occurs.
2
Compare the feedback signal voltage on an oscilloscope to expected waveform patterns from manufacturer service data.
3
Check for high resistance in the feedback circuit wiring that could attenuate the signal.
4
Verify the pump is mechanically sound by checking for abnormal noise, vibration, or inconsistent fluid output.
5
If the pump and wiring are good, replace the control module and perform any required relearn procedures.
Estimated Repair Cost
$200 - $900
Parts + labor, varies by vehicle and location
DTC P0C2C indicates the feedback signal from the auxiliary transmission fluid pump control module is out of its expected range or not performing correctly relative to commanded operation. The signal is present but does not correlate properly with the pump's commanded speed or state, suggesting a cal...
The most common cause of P0C2C (Auxiliary Transmission Fluid Pump Control Module Feedback Signal Range/Performance) is: Degraded feedback sensor within the pump control module producing inaccurate readings
Typical repair costs for P0C2C range from $200 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
A feedback signal that does not match commanded operation prevents the TCM/PCM from accurately controlling pump output. The system may compensate by defaulting to open-loop operation or activating a fail-safe mode that limits vehicle performance. Address to restore normal transmission operation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0C2C 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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