Engine-Codes - Generic - P0C21

P0C21 Code - Auxiliary Transmission Fluid Pump Phase U-V-W Circuit Low

- Code Popularity: 1,660 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the P0C21 Code?

  • Faulty Auxiliary Transmission Fluid Pump
  • Auxiliary Transmission Fluid Pump harness is open or shorted
  • Auxiliary Transmission Fluid Pump circuit poor electrical connection

|How to Fix the P0C21 Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the cost to diagnose the P0C21 code?

Labor: 1.0

The cost to diagnose the P0C21 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are P0C21 code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What Does the P0C21 Code Mean?

The Engine Control Module (ECM) monitors the Auxiliary Transmission Fluid Pump. The ECM sets the OBDII code when the Auxiliary Transmission is not to factory specifications.

Auxiliary Transmission Fluid Pump Phase U-V-W Circuit Low

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