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Code P0C1C

Quick reference

P0C1C at a glance

Plain-language meaning
This code means that the car's computer found a problem with the sensor that checks how hot the transmission fluid pump is getting.
Urgency
Moderate – Should be addressed soon to prevent potential transmission damage.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Basic hand tools

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

Laymans terms

This code means that the car's computer found a problem with the sensor that checks how hot the transmission fluid pump is getting.

Explanation

The P0C1C code indicates an issue with the internal temperature sensor circuit of the electric or auxiliary transmission fluid pump control module.

Technical description

The P0C1C code is triggered when the vehicle's powertrain control module (PCM) detects a malfunction in the circuit of the internal temperature sensor within the electric or auxiliary transmission fluid pump control module. This sensor is responsible for monitoring the temperature of the transmission fluid pump to ensure it operates within safe limits.

Symptoms

• Check Engine Light illumination

• Transmission overheating

• Poor transmission performance

Common Causes

• Faulty temperature sensor

• Damaged wiring or connectors

• Faulty control module

Glossary

PCM: Powertrain Control Module

OBD-II: On-Board Diagnostics, Second Generation

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect wiring and connectors for damage.

• Test the temperature sensor for proper operation.

Repair procedures

• Replace faulty temperature sensor.

• Repair or replace damaged wiring/connectors.

• Replace control module if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$150 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Toyota Prius

• Chevrolet Volt

• Ford Fusion Hybrid

Preventive measures

• Regular maintenance checks

• Ensure proper fluid levels

• Inspect wiring regularly

Error code type

Sensor Issue

User experience recommendations

• Address the issue promptly to avoid further damage.

• Consult a professional mechanic if unsure.

Warranty information

Check with the manufacturer for warranty coverage on transmission components.

Historical data

The P0C1C code has been associated with hybrid and electric vehicles due to their reliance on electric auxiliary systems.

Urgency level

Moderate – Should be addressed soon to prevent potential transmission damage.

Testing conditions

• Vehicle at operating temperature

• Transmission in normal operation mode

Component location

The temperature sensor is located within the electric or auxiliary transmission fluid pump control module, typically near the transmission assembly.

FAQs

Q: What happens if I ignore this code?
A: Ignoring this code can lead to transmission overheating and potential damage.

Q: Can I drive with the P0C1C code?
A: It's best to address the issue promptly to avoid transmission damage.

Optional diagnostic gear

Tools that may help diagnose P0C1C

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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