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P0C22 OBD2: AUXILIARY Transmission Fluid Pump Phase U-V-W Circuit High

P0C22 OBD2: AUXILIARY Transmission Fluid Pump Phase U-V-W Circuit High

What Does the P0C22 Code Mean?

The P0C22 code refers to a fault detected in the Auxiliary Transmission Fluid Pump Phase U-V-W Circuit, which is essential for the operation of the transmission’s electric motor. This code suggests that the Motor Control Module has detected high voltage in the circuit, which can lead to transmission failure.

What Causes the P0C22 Code?

Several factors can trigger the P0C22 code, including:

  • Failure of the auxiliary transmission pump
  • Malfunction of the Drive Motor Generator Power Inverter Control Module
  • Issues with wiring or connectors in the circuit
  • Short circuits or open circuits in the pump phase circuit

What Are the Symptoms of the P0C22 Code?

Symptoms associated with the P0C22 code may include:

  • The vehicle may become immovable
  • Transmission may exhibit erratic behavior
  • Warning lights on the dashboard may illuminate
  • Unusual noises from the transmission area

How Serious Is the P0C22 Code?

The P0C22 code is considered urgent. Ignoring this code can lead to severe damage to the transmission and compromise vehicle safety. It is crucial to address this issue promptly to avoid costly repairs down the road.

How to Diagnose the P0C22 Code

Diagnosing the P0C22 code involves several steps:

  1. Use an OBD-II scanner to confirm the code and check for any additional codes.
  2. Inspect the wiring and connectors related to the auxiliary transmission pump for damage or corrosion.
  3. Test the auxiliary transmission pump for proper operation.
  4. Check the functionality of the Drive Motor Generator Power Inverter Control Module.

Common Repairs for the P0C22 Code

Repairs for the P0C22 code can include:

  • Replacing the auxiliary transmission pump
  • Repairing or replacing damaged wiring and connectors
  • Replacing the Drive Motor Generator Power Inverter Control Module if it is found to be defective
  • Resetting the OBD-II system and clearing the fault codes after repairs

How Much Does It Cost to Fix the P0C22 Code?

The cost to repair the P0C22 code can vary widely depending on the specific issue and the make and model of the vehicle. On average, repairs can range from $200 to $1,500, depending on whether you need to replace the pump, wiring, or control module.

Can I Fix the P0C22 Code Myself?

While some DIY enthusiasts may attempt to fix the P0C22 code, it is recommended to have a professional mechanic diagnose and repair the issue. Proper tools and expertise are often required to ensure that the underlying problem is resolved effectively. Attempting to fix it without sufficient knowledge may lead to further complications.

About JC Landry

JC spent 15+ years as a certified Master Mechanic before trading the shop for the keyboard. He's worked across dealerships, owned and operated his own independent garage, and consulted on automotive trade school curricula, reviewing technical textbooks used in vocational programs. He now serves as Editor-in-Chief at eManualOnline.com, where he oversees the platform's technical content. He's one of the few voices in automotive publishing who has actually turned wrenches professionally on the vehicles he covers. He didn't learn automotive repair to write about it. He learned to write after spending over a decade doing it.

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