Engine-Codes - Generic - C1738

C1738 Code - Left Front Height Control Solenoid Valve Circuit

- Code Popularity: 5,218 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC C1738?

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 Left Front Height Control Solenoid Valve
  • Left Front Height Control Solenoid Valve harness is open or shorted
  • Left Front Height Control Solenoid Valve circuit poor electrical connection
  • Faulty Suspension Electronic Control Unit (ECU)
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How to Fix the DTC C1738?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the C1738 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops 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)

What Does the C1738 Code Mean?

The Suspension Electronic Control Unit (ECU) energizes the height control solenoid valve, which opens the valve and leads compressed air to the pneumatic cylinder, thus raising the vehicle height. When the vehicle height is lowered, the ECU energizes not only the height control solenoid valve but also the exhaust valve which open the valve and discharge the compressed air in the pneumatic cylinder to the atmosphere. Front and rear height control valves have 2 solenoid valves to control right hand and left hand pneumatic cylinders separately. The exhaust valve is located on the compressor unit, and has one valve only.

C1738 Code - Left Front Height Control Solenoid Valve Circuit

Need more Information on the Code?

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Code C1738 Information for Specific Makes

  • C1738 Lexus Left Front Height Control Solenoid Valve Circuit
  • C1738 Toyota Left Front Height Control Solenoid Valve Circuit

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