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Code P1C37

Quick reference

P1C37 at a glance

Plain-language meaning
This code means that the computer in your car found a problem with the electric motor's safety system. It's like when your toy robot's battery doesn't connect properly, and it stops working right.
Urgency
High – This issue may affect the safety and performance of the vehicle.
Difficulty
Moderate
System
Electrical System 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 computer in your car found a problem with the electric motor's safety system. It's like when your toy robot's battery doesn't connect properly, and it stops working right.

Explanation

The P1C37 code is triggered when the drive motor control module detects an issue with the input voltage related to its safety functions.

Technical description

The P1C37 code indicates that the Drive Motor 'A' Control Module has detected an error in the input voltage that is critical for its safety functions. This could affect the operation of the electric drive motor, potentially leading to reduced performance or safety risks.

Symptoms

• Check Engine Light is on

• Reduced vehicle performance

• Unusual noises from the electric motor

Common Causes

• Faulty drive motor control module

• Poor electrical connections

• Defective wiring or connectors

Glossary

Drive Motor: An electric motor that propels the vehicle.

Control Module: A computer that manages the operation of a specific system in the vehicle.

Diagnosis steps

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

• Inspect the wiring and connectors related to the drive motor control module.

• Test the voltage levels at the control module.

Repair procedures

• Repair or replace damaged wiring or connectors.

• Replace the drive motor control module if faulty.

• Ensure all electrical connections are secure.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$200 - $800

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Volt

• Nissan Leaf

• Toyota Prius

Preventive measures

• Regularly inspect electrical connections.

• Ensure proper maintenance of the vehicle's electrical system.

• Avoid exposure to extreme conditions that can damage wiring.

Error code type

Electrical System Issue

User experience recommendations

• Avoid driving the vehicle until the issue is diagnosed and repaired.

• Consult a professional mechanic for accurate diagnosis.

Warranty information

Check with your vehicle manufacturer for warranty coverage on the drive motor control module.

Historical data

This code has become more common with the increase in electric and hybrid vehicles, highlighting the importance of maintaining the electrical systems in these vehicles.

Urgency level

High – This issue may affect the safety and performance of the vehicle.

Testing conditions

• Vehicle at operating temperature

• Drive motor control module active

Component location

The drive motor control module is typically located near the electric motor or within the power control electronics housing.

FAQs

Q: Can I drive my car with a P1C37 code?
A: It's not recommended as the issue may affect vehicle safety and performance.

Q: How do I know if my drive motor control module is faulty?
A: A professional diagnostic test can confirm if the module is faulty.

Optional diagnostic gear

Tools that may help diagnose P1C37

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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