AutoCodes – Generic – C1437

C1437 Code - Lost Communication With ECM

Quick Answer

The Skid Control ECU (Brake Actuator Assembly) receives signals from the Engine Control Module (ECM) via the Controller Area Network (CAN) communication system. Common causes include Faulty Skid Control ECU (Brake Actuator Assembly), Skid Control ECU harness is open or shorted, Skid Control ECU 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: C1437 indicates Lost Communication With ECM.
Common causes: Common causes include Faulty Skid Control ECU (Brake Actuator Assembly), Skid Control ECU harness is open or shorted, Skid Control ECU 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 5,260

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 Jan 30, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1437 Description

The Skid Control ECU (Brake Actuator Assembly) receives signals from the Engine Control Module (ECM) via the Controller Area Network (CAN) communication system. The Diagnostic Trouble Code (DTC) will be set when the terminal voltage is 10 V or more and the vehicle speed is 15 km/h (9 mph) or more, data cannot be sent to the ECM for 2 seconds or more.

OBDII Code C1437 - Lost Communication With ECM - AutoCodes.com — C1437 Code - Lost Communication With ECM

What does this mean?

What are the Possible Causes of the DTC C1437?

Faulty Skid Control ECU (Brake Actuator Assembly)
Skid Control ECU harness is open or shorted
Skid Control ECU circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC C1437?

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 C1437 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 C1437 code?

Need more information on how to fix the C1437 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1437 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1437 Lexus — Lost Communication With ECM
C1437 Scion — Lost Communication With ECM
C1437 Toyota — Lost Communication With ECM

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 C1437 Code

1. What are the common symptoms of OBDII code C1437, Lost Communication With ECM?

- Common symptoms include the check engine light illuminating, loss of engine performance, and issues with vehicle drivability.

2. What are the possible causes of OBDII code C1437?

- Possible causes include a faulty ECM (engine control module), damaged wiring or connectors, a blown fuse, or software issues.

3. How can I diagnose the source of the communication loss with the ECM?

- Diagnosis involves checking for any visible damage to wiring and connectors, verifying fuse integrity, and using a diagnostic scanner to communicate with the ECM.

4. What are some repair tips for resolving OBDII code C1437?

- Repair tips include repairing or replacing damaged wiring and connectors, checking and replacing blown fuses, and reprogramming or replacing the ECM if necessary.

5. Can OBDII code C1437 cause any long-term damage to the vehicle?

- While the code itself may not cause immediate damage, continued driving with communication issues can lead to other problems, so it's important to address the issue promptly.

6. Is it safe to drive with OBDII code C1437 present?

- It is not recommended to drive with this code present, as it can affect engine performance and potentially lead to more serious issues if left unresolved.

7. How much does it typically cost to repair OBDII code C1437?

- The cost of repair can vary depending on the underlying cause, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can I reset the code C1437 on my own, or do I need a professional mechanic?

- You can attempt to clear the code using an OBDII scanner, but if the issue persists, it's best to have a professional mechanic diagnose and repair the problem.

9. Will disconnecting the battery reset OBDII code C1437?

- Disconnecting the battery may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear after driving the vehicle.

10. How do I prevent OBDII code C1437 from occurring in the future?

- To prevent this code, regular vehicle maintenance, checking for loose or damaged wiring, and addressing any ECM software updates can help maintain proper communication with the ECM.