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Code P1E37

Quick reference

P1E37 at a glance

Plain-language meaning
This code means that the car's computer found a problem with the sensor that checks the voltage for the electric motor. It's like when a toy's battery is low and it doesn't work right.
Urgency
Moderate – Should be addressed soon to avoid potential drivability issues.
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 the voltage for the electric motor. It's like when a toy's battery is low and it doesn't work right.

Explanation

The vehicle's control module has detected a low voltage signal from the voltage sensor circuit associated with Drive Motor 'B'.

Technical description

The P1E37 code indicates that the control module for Drive Motor 'B' has detected a voltage reading that is below the expected range from the voltage sensor circuit. This could be due to a fault in the sensor, wiring issues, or a problem with the control module itself.

Symptoms

• Check Engine Light is on

• Reduced vehicle performance

• Possible drivability issues

Common Causes

• Faulty voltage sensor

• Wiring issues or poor connections

• Defective Drive Motor 'B' control module

Glossary

Voltage Sensor: A device that measures the voltage in an electrical circuit.

Control Module: A computer in the vehicle that controls various functions.

Diagnosis steps

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

• Inspect the wiring and connections to the voltage sensor.

• Test the voltage sensor for proper operation.

Repair procedures

• Replace the faulty voltage sensor.

• Repair or replace damaged wiring or connectors.

• Replace the Drive Motor 'B' control module if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$200 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Volt

• Cadillac ELR

• Chevrolet Spark EV

Preventive measures

• Regularly inspect and maintain wiring connections.

• Ensure sensors are clean and free of debris.

• Schedule regular vehicle check-ups.

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 if performance is significantly reduced.

Warranty information

Check with your vehicle manufacturer for warranty coverage on electrical components.

Historical data

This code has been associated with hybrid and electric vehicles and is commonly related to sensor or wiring issues.

Urgency level

Moderate – Should be addressed soon to avoid potential drivability issues.

Testing conditions

• Vehicle at operating temperature

• Drive Motor 'B' engaged

Component location

The voltage sensor is typically located near the drive motor or within the control module housing.

FAQs

Q: Can I drive my car with the P1E37 code?
A: It's not recommended to drive for long distances as it may affect vehicle performance.

Q: Will resetting the code fix the problem?
A: Resetting may temporarily clear the code, but the underlying issue must be fixed to prevent it from returning.

Optional diagnostic gear

Tools that may help diagnose P1E37

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.

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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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