AutoCodes – Generic – P1E37

P1E37 Code - Auxiliary Transmission Fluid Pump Inverter High Temperature

Quick Answer

The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid powertrain control module. Common causes include Program Power Inverter Module, Faulty Power Inverter Module, Power Inverter Module harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1E37 indicates Auxiliary Transmission Fluid Pump Inverter High Temperature.
Common causes: Common causes include Program Power Inverter Module, Faulty Power Inverter Module, Power Inverter Module harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,523

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E37 Description

The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid powertrain control module. Two of the motor control modules operate their respective drive motor generator based upon power inverter module commands. The third motor control module controls the auxiliary transmission fluid pump motor. The inverter temperature sensor is part of the power inverter module and is not serviced separately.

OBDII Code P1E37 - Auxiliary Transmission Fluid Pump Inverter High Temperature - AutoCodes.com — P1E37 Code - Auxiliary Transmission Fluid Pump Inverter High Temperature

What does this mean?

What are the Possible Causes of the DTC P1E37?

Program Power Inverter Module
Faulty Power Inverter Module
Power Inverter Module harness is open or shorted
Power Inverter Module circuit poor electrical connection

How to Fix the DTC P1E37?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1E37 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need Help with the Code?

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Information for Specific Makes

P1E37 Acura — Brake Pedal Feel Simulator Cut Valve Stuck OFF Stuck Close
P1E37 Buick — Auxiliary Transmission Fluid Pump Inverter High Temperature
P1E37 Cadillac — Auxiliary Transmission Fluid Pump Inverter High Temperature
P1E37 Chevrolet — Auxiliary Transmission Fluid Pump Inverter High Temperature
P1E37 GMC — Auxiliary Transmission Fluid Pump Inverter High Temperature
P1E37 Honda — Brake Pedal Feel Simulator Cut Valve Stuck OFF Stuck Close
P1E37 Saturn — Auxiliary Transmission Fluid Pump Inverter High Temperature

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1E37 Code

1. What does the OBDII code P1E37 mean?

P1E37 indicates a high temperature has been detected in the auxiliary transmission fluid pump inverter, which is part of the hybrid or electric vehicleâ€™s transmission system.

2. What are the common symptoms of code P1E37?

Symptoms may include an illuminated check engine light, reduced transmission performance, overheating warnings, or the vehicle entering limp mode.

3. What causes the P1E37 code to appear?

Common causes include a faulty auxiliary transmission fluid pump inverter, an overheating condition due to low fluid levels, restricted fluid flow, or electrical issues such as wiring or connector problems.

4. Can I drive my vehicle with a P1E37 code?

Driving with this code is not recommended as it may lead to further damage to the transmission components or inverter due to overheating.

5. How do I diagnose a P1E37 code?

Diagnosis involves inspecting the auxiliary pump and inverter for damage, checking transmission fluid levels and condition, and testing electrical connections for continuity or corrosion.

6. How can I fix the P1E37 code?

Repairs may include replacing the auxiliary transmission fluid pump inverter, addressing wiring or connector faults, or flushing and refilling the transmission fluid.

7. What tools are needed to troubleshoot a P1E37 code?

Youâ€™ll need an OBDII scanner, a multimeter for electrical testing, and potentially tools for draining and refilling transmission fluid.

8. Could a low transmission fluid level trigger the P1E37 code?

Yes, low or degraded transmission fluid can cause overheating, which may trigger this code.

9. Is the P1E37 code specific to hybrid or electric vehicles?

Yes, it typically applies to hybrid or electric vehicles that use an auxiliary transmission fluid pump inverter for cooling or lubrication.

10. How much does it cost to fix a P1E37 code?

Repair costs vary but may range from $200 to $1,000, depending on whether the issue involves a simple fluid replacement or a more extensive inverter or pump repair.