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Code P1C55

Quick reference

P1C55 at a glance

Plain-language meaning
This code means that the car's computer found a problem with the sensors that check the voltage (or electrical power) in a part of the car that helps charge the battery. It's like if a toy had a battery checker, and the checker wasn't working right.
Urgency
Moderate – It should be addressed soon to prevent battery charging issues.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Wiring repair 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 sensors that check the voltage (or electrical power) in a part of the car that helps charge the battery. It's like if a toy had a battery checker, and the checker wasn't working right.

Explanation

The P1C55 code indicates that there is a discrepancy between the readings of the system voltage sensor and the crash clamp voltage sensor in the Universal Charger Extension Control Module.

Technical description

The Universal Charger Extension Control Module is responsible for managing the charging system in the vehicle. It uses various sensors to monitor the voltage levels. The P1C55 code is triggered when the system voltage sensor and the crash clamp voltage sensor provide inconsistent readings, suggesting a potential fault in sensor calibration or a wiring issue.

Symptoms

• Check engine light on

• Charging system warning light

• Inconsistent battery charging

Common Causes

• Faulty voltage sensor

• Wiring issues

• Malfunctioning Universal Charger Extension Control Module

Glossary

Voltage Sensor: A device that measures the electrical voltage in a system.

Universal Charger Extension Control Module: A component that manages the vehicle's charging system.

Diagnosis steps

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

• Inspect the wiring and connectors related to the sensors.

• Test the voltage sensors for proper operation.

Repair procedures

• Replace faulty voltage sensor.

• Repair or replace damaged wiring.

• Recalibrate or replace the Universal Charger Extension Control Module.

Tools required

• OBD-II scanner

• Multimeter

• Wiring repair tools

Estimated repair cost

$150 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Vehicle 1

• Vehicle 2

• Vehicle 3

Preventive measures

• Regular maintenance checks

• Ensure proper wiring connections

• Use quality sensors

Error code type

Sensor Issue

User experience recommendations

• Have the vehicle inspected by a professional.

• Avoid driving long distances until the issue is resolved.

Warranty information

Check with the vehicle manufacturer for specific warranty coverage related to the charging system.

Historical data

This code has been associated with issues in vehicles using advanced charging systems, particularly in hybrid and electric models.

Urgency level

Moderate – It should be addressed soon to prevent battery charging issues.

Testing conditions

• Vehicle ignition on

• Battery fully charged

Component location

The Universal Charger Extension Control Module is typically located near the vehicle's battery or within the engine compartment.

FAQs

Q: Can I drive with a P1C55 code?
A: It's not recommended as it may lead to battery charging issues.

Q: How do I clear a P1C55 code?
A: Fix the underlying issue, then use an OBD-II scanner to clear the code.

Optional diagnostic gear

Tools that may help diagnose P1C55

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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