ezOBD2 - Free OBD2 Code Lookup and Check Engine Light Diagnostic Tool

Find Your OBD2 Code Fast

Type the code from your scanner to get causes, symptoms, and fixes.

Code P0C64

Quick reference

P0C64 at a glance

Plain-language meaning
This code means that the car's computer has detected a problem with a sensor that tells it where the generator is. It's like if your game console couldn't tell where the controller is.
Urgency
Moderate – Address the issue soon to prevent further electrical problems.
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 has detected a problem with a sensor that tells it where the generator is. It's like if your game console couldn't tell where the controller is.

Explanation

The P0C64 code is triggered when the vehicle's powertrain control module (PCM) detects an issue with the generator position sensor circuit, specifically circuit A.

Technical description

The generator position sensor is responsible for providing feedback to the PCM about the position and rotational speed of the generator. This information is crucial for the PCM to control the generator's output effectively. A fault in the sensor or its circuit can lead to improper generator operation.

Symptoms

• Check Engine Light is on

• Vehicle may not charge the battery properly

• Possible stalling or reduced engine performance

Common Causes

• Faulty generator position sensor

• Damaged or corroded wiring or connectors

• Faulty PCM

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 for damage or corrosion.

• Test the generator position sensor for proper operation.

Repair procedures

• Replace the generator position sensor if faulty.

• Repair or replace damaged wiring or connectors.

• Reprogram or replace the PCM 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 electrical connections are clean and secure

• Monitor battery and charging system performance

Error code type

Sensor Issue

User experience recommendations

• Avoid driving long distances until the issue is resolved.

• Have the vehicle inspected by a professional mechanic.

Warranty information

Check your vehicle's warranty for coverage on electrical components.

Historical data

This code has been more commonly reported in hybrid and electric vehicles due to their complex electrical systems.

Urgency level

Moderate – Address the issue soon to prevent further electrical problems.

Testing conditions

• Vehicle at operating temperature

• Battery fully charged

Component location

The generator position sensor is typically located near the generator or alternator.

FAQs

Q: Can I drive with a P0C64 code?
A: It's not recommended to drive long distances, as it may lead to battery charging issues.

Q: How can I prevent P0C64 from occurring?
A: Regular maintenance and ensuring all electrical connections are secure can help prevent this issue.

Optional diagnostic gear

Tools that may help diagnose P0C64

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
🌙