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Code P0C2C

Quick reference

P0C2C at a glance

Plain-language meaning
This code means that a part of the car that helps move the transmission fluid isn't working right. It's like when a toy's battery is low and it can't run as fast.
Urgency
Moderate – It should be addressed soon to prevent further transmission issues.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Transmission fluid pump tester

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means that a part of the car that helps move the transmission fluid isn't working right. It's like when a toy's battery is low and it can't run as fast.

Explanation

The code P0C2C indicates an issue with the feedback signal from the electric or auxiliary transmission fluid pump control module. The signal is either out of range or not performing as expected.

Technical description

The P0C2C code is set when the Powertrain Control Module (PCM) detects that the feedback signal from the electric or auxiliary transmission fluid pump control module is not within the expected range or is not performing correctly. This can affect the operation of the transmission fluid pump, which is crucial for maintaining proper transmission fluid pressure and ensuring smooth gear shifts.

Symptoms

• Check Engine Light is on

• Transmission may not shift properly

• Unusual noises from the transmission

• Decreased fuel efficiency

• Vehicle may enter limp mode

Common Causes

• Faulty electric/auxiliary transmission fluid pump

• Wiring issues or poor connections in the pump circuit

• Defective control module

• Low transmission fluid levels

• Internal transmission issues

Glossary

PCM: Powertrain Control Module

OBD-II: On-Board Diagnostics, Second Generation

Diagnosis steps

• Use an OBD-II scanner to confirm the code

• Inspect the wiring and connectors related to the pump

• Check the transmission fluid level and condition

• Test the electric/auxiliary transmission fluid pump

• Check the control module for faults

Repair procedures

• Repair or replace damaged wiring or connectors

• Replace the electric/auxiliary transmission fluid pump if faulty

• Replace or reprogram the control module if needed

• Refill or replace transmission fluid

• Perform a transmission system inspection

Tools required

• OBD-II scanner

• Multimeter

• Transmission fluid pump tester

Estimated repair cost

$200 - $800

Difficulty level

Moderate

Commonly affected vehicles

• Toyota Prius

• Chevrolet Volt

• Ford Fusion Hybrid

Preventive measures

• Regularly check transmission fluid levels

• Inspect wiring and connectors for damage

• Perform scheduled maintenance on the transmission system

Error code type

Sensor Issue

User experience recommendations

• Do not ignore the Check Engine Light

• Have the vehicle inspected by a professional

• Avoid driving the vehicle until the issue is resolved

Warranty information

Check with the vehicle manufacturer for warranty coverage on transmission components.

Historical data

This code has been more common in hybrid vehicles due to their complex transmission systems.

Urgency level

Moderate – It should be addressed soon to prevent further transmission issues.

Testing conditions

• Vehicle at operating temperature

• Transmission in normal operating mode

Component location

The electric/auxiliary transmission fluid pump is typically located near the transmission assembly.

FAQs

Q: Can I drive with a P0C2C code?
A: It's not recommended to drive with this code as it can lead to further transmission damage.

Q: How do I reset the Check Engine Light after fixing the issue?
A: Use an OBD-II scanner to clear the code after the repairs are completed.

Optional diagnostic gear

Tools that may help diagnose P0C2C

THINKCAR ThinkScan Bidirectional diagnostic tool illustration

High-End · Full-system diagnostics

THINKCAR ThinkScan Bidirectional

A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.

Network faults often require full-system access instead of a generic code reader alone.

View on Amazon
Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.

View on Amazon
WORKPRO Wiring Repair Kit diagnostic tool illustration

Universal · Wire connectors and repair kit

WORKPRO Wiring Repair Kit

Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.

Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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