AutoCodesLexus – C1907 Lexus

C1907 Lexus Code - Front ECU And Rear ECU Failure

Quick Answer

The Front Active Stabilizer Control ECU and rear active stabilizer control ECU use CAN communication to perform a mutual system check. Common causes include Faulty Front Active Stabilizer Control ECU, Front Active Stabilizer Control ECU harness is open or shorted, Front Active Stabilizer 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
C1907 Lexus indicates Front ECU And Rear ECU Failure.
Common causes
Common causes include Faulty Front Active Stabilizer Control ECU, Front Active Stabilizer Control ECU harness is open or shorted, Front Active Stabilizer 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 632
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Dec 03, 2020
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Code C1907 Lexus Description

The Front Active Stabilizer Control ECU and rear active stabilizer control ECU use CAN communication to perform a mutual system check. If a problem occurs in the wire harness or front active stabilizer control ECU, DTC C1907/12 is stored.
OBDII Code C1907 Lexus - Front ECU And Rear ECU Failure - AutoCodes.com
C1907 Lexus Code - Front ECU And Rear ECU Failure

What are the Possible Causes of the DTC C1907 Lexus?

  • Faulty Front Active Stabilizer Control ECU
  • Front Active Stabilizer Control ECU harness is open or shorted
  • Front Active Stabilizer Control ECU circuit poor electrical connection

How to Fix the DTC C1907 Lexus?

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 C1907 Lexus 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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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 C1907 Lexus Code

1. What does the OBDII code C1907 mean on a Lexus?

C1907 indicates communication failure or malfunction between the Front ECU and Rear ECU in the vehicle.

2. What are the common symptoms of the C1907 code in a Lexus?

Symptoms may include malfunctioning suspension height adjustment, warning lights on the dashboard, and inconsistent vehicle handling.

3. What causes the C1907 code to appear in a Lexus?

Common causes include damaged wiring, loose or corroded electrical connections, faulty Front or Rear ECU, or software issues in the electronic control units.

4. Can driving with the C1907 code cause further damage?

Driving with this code may not immediately damage the vehicle, but it can lead to unsafe handling or suspension issues if left unresolved.

5. How do I diagnose the C1907 code?

Use an OBDII scanner to confirm the code, inspect the wiring and connectors between the Front and Rear ECUs, and test the ECUs for functionality.

6. Is the C1907 code related to the air suspension system in a Lexus?

Yes, this code often affects Lexus models with electronic air suspension systems, as the Front and Rear ECUs communicate to regulate suspension height.

7. Can a weak or dead vehicle battery trigger the C1907 code?

Yes, a weak battery or voltage fluctuations can disrupt ECU communication and trigger this code.

8. What is the estimated cost to fix the C1907 code?

Repair costs can vary widely depending on the issue, ranging from $100 for wiring repairs to over $1,000 if an ECU replacement is needed.

9. Can I reset the C1907 code without fixing the problem?

You can clear the code with a scanner, but it will likely return if the underlying issue is not resolved.

10. Should I take my Lexus to a dealership for a C1907 code repair?

If basic troubleshooting doesn’t resolve the issue, it’s recommended to visit a dealership or qualified mechanic familiar with Lexus electronics.

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