AutoCodes – Generic – P0737

P0737 Code - TCM Engine Speed Output Circuit

Quick Answer

The Transmission Control Module (TCM) monitors the engine speed signal through the engine output speed sensor (turbine sensor). Common causes include Faulty Engine Output Speed Sensor, Engine Output Speed Sensor harness is open or shorted, Engine Output Speed Sensor circuit poor electrical connection. 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: P0737 indicates TCM Engine Speed Output Circuit.
Common causes: Common causes include Faulty Engine Output Speed Sensor, Engine Output Speed Sensor harness is open or shorted, Engine Output Speed Sensor circuit poor electrical connection.
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 5,986

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, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0737 Description

The Transmission Control Module (TCM) monitors the engine speed signal through the engine output speed sensor (turbine sensor). The TCM sets the OBDII code when the engine speed sensor signal is not to factory specifications.

OBDII Code P0737 - TCM Engine Speed Output Circuit - AutoCodes.com — P0737 Code - TCM Engine Speed Output Circuit

What does this mean?

What are the Possible Causes of the DTC P0737?

Faulty Engine Output Speed Sensor
Engine Output Speed Sensor harness is open or shorted
Engine Output Speed Sensor circuit poor electrical connection
Faulty Crank Shaft Position Sensor

How to Fix the DTC P0737?

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 P0737 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.

Need more information about the P0737 code?

Need more information on how to fix the P0737 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0737 code diagnosed by a professional: Find a repair shop in your area

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 P0737 Code

1. What are the common symptoms of OBDII code P0737 (TCM Engine Speed Output Circuit)?

- Common symptoms include harsh shifting, slipping transmission, decreased fuel efficiency, and illuminated Check Engine light.

2. What are the possible causes of OBDII code P0737?

- The code may be caused by a faulty transmission control module (TCM), damaged wiring or connectors in the engine speed output circuit, or a malfunctioning engine speed sensor.

3. How can I diagnose OBDII code P0737?

- Diagnosis typically involves using a scan tool to read the code, inspecting the wiring and connectors for damage, and testing the engine speed sensor for proper operation.

4. Can I drive my vehicle with OBDII code P0737?

- It is not recommended to drive your vehicle with this code as it can lead to further damage to the transmission. It is best to have the issue diagnosed and repaired promptly.

5. How can I repair OBDII code P0737?

- Repair may involve replacing a faulty engine speed sensor, repairing damaged wiring or connectors, or replacing the TCM if necessary. It is recommended to have a professional mechanic perform the repair.

6. Are there any DIY tips for fixing OBDII code P0737?

- DIY tips include checking and cleaning the connectors in the engine speed output circuit, inspecting for visible wire damage, and ensuring proper installation of any replaced components.

7. Is OBDII code P0737 a serious issue?

- Yes, this code can indicate potential transmission problems that can worsen over time if left unresolved. It is important to address the issue promptly to prevent further damage.

8. Can weather conditions affect OBDII code P0737?

- Extreme weather conditions, such as extreme heat or cold, can sometimes exacerbate issues related to the engine speed output circuit. It is important to keep this in mind when diagnosing the problem.

9. How long does it typically take to repair OBDII code P0737?

- The repair time can vary depending on the exact cause of the code and the extent of the repairs needed. In general, repairs for this code can take a few hours to a full day.

10. Will resetting the OBDII code P0737 make it go away permanently?

- Simply resetting the code may temporarily turn off the Check Engine light, but if the underlying issue is not addressed, the code is likely to return. It is crucial to diagnose and repair the root cause of the problem.