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 P1D37

Quick reference

P1D37 at a glance

Plain-language meaning
This code means that there is a problem with the sensor that checks how much electricity is going to the air conditioner's motor in your car. It's like when a toy's battery checker says the battery is too strong.
Urgency
Moderate – The A/C may not function properly, but it does not affect vehicle safety.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Wiring diagram

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

Laymans terms

This code means that there is a problem with the sensor that checks how much electricity is going to the air conditioner's motor in your car. It's like when a toy's battery checker says the battery is too strong.

Explanation

The P1D37 code indicates an issue with the current sensor circuit for the Phase W of the A/C compressor motor. The sensor is detecting a higher than expected current, which could indicate a fault in the sensor or wiring.

Technical description

The A/C compressor motor in some vehicles is driven by an electric motor with multiple phases. Each phase has a current sensor to monitor the electrical current. The Phase W current sensor circuit is reporting a higher than normal current, which could be due to a short circuit, faulty sensor, or other electrical issues.

Symptoms

• A/C not working properly

• Check engine light on

• Unusual noises from the A/C system

Common Causes

• Faulty current sensor

• Short circuit in the wiring

• Faulty A/C compressor motor

Glossary

A/C: Air Conditioning

Compressor: A device that compresses air or gas

Sensor: A device that detects or measures a physical property

Diagnosis steps

• Check for any stored trouble codes

• Inspect the wiring and connections to the current sensor

• Test the current sensor for proper operation

Repair procedures

• Replace the faulty current sensor

• Repair any damaged wiring

• Replace the A/C compressor motor if necessary

Tools required

• OBD-II scanner

• Multimeter

• Wiring diagram

Estimated repair cost

$150 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Honda Accord

• Honda Civic

• Acura MDX

Preventive measures

• Regular maintenance of the A/C system

• Inspect electrical connections periodically

• Avoid overloading the electrical system

Error code type

Sensor Issue

User experience recommendations

• Have the vehicle inspected by a professional

• Avoid using the A/C until the issue is resolved

Warranty information

Check with the vehicle manufacturer for warranty coverage on A/C components.

Historical data

This code is more common in vehicles with electric A/C compressors and may occur due to age-related wear or electrical issues.

Urgency level

Moderate – The A/C may not function properly, but it does not affect vehicle safety.

Testing conditions

• Vehicle at operating temperature

• A/C system turned on

Component location

The A/C compressor motor is usually located in the engine bay, connected to the vehicle's serpentine belt system.

FAQs

Q: Can I drive my car with this code?
A: Yes, but the A/C may not work properly, so it might be uncomfortable in hot weather.

Q: Will this code affect my engine?
A: No, this code is related to the A/C system and does not affect the engine's performance.

Optional diagnostic gear

Tools that may help diagnose P1D37

FOXWELL NT301 diagnostic tool illustration

Budget · Enhanced code reader

FOXWELL NT301

A wired color-screen reader with readiness hotkeys, live data, code definitions, and data logging.

A dependable first-pass scanner for verifying the code and checking live data or readiness monitors.

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 voltage, continuity, and basic electrical checks while narrowing down the fault.

View on Amazon
TEKTON 3/8" Socket and Ratchet Set diagnostic tool illustration

Universal · Socket set

TEKTON 3/8" Socket and Ratchet Set

A practical metric and SAE socket set for many diagnostic teardowns and component replacements.

Useful for common under-hood access and removal work during diagnosis or repair.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
🌙