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C1789 Lexus Code - L4 Switch Circuit Malfunction

- Code Popularity: 1,548 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC C1789 Lexus?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty L4 Switch Circuit
  • L4 Switch Circuit harness is open or shorted
  • L4 Switch Circuit circuit poor electrical connection
  • Faulty Suspension Control ECU
⚠ Does your Lexus have Safety Recalls? → Check here

How to Fix the DTC C1789 Lexus?

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

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1789 Lexus code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

Code C1789 Lexus Description

This circuit is sending the signal to the Suspension Control ECU by detecting that the transfer shift lever is in L4 position.

OBDII Code C1789 Lexus - L4 Switch Circuit Malfunction - AutoCodes.com
C1789 Lexus Code - L4 Switch Circuit Malfunction

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Code C1789 Lexus comments

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