Engine-Codes - Generic - U3503

U3503 Code - Control Module Input Power 'A' Circuit Intermittent/Erratic

- Code Popularity: 862 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC U3503?

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 Control Module setting the code
  • Control Module harness is open or shorted
  • Control Module circuit poor electrical connection
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How to Fix the DTC U3503?

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 U3503 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?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the U3503 Code Mean?

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. With the ignition is ON, the Diagnostic Trouble Code (DTC) will set when the control module or sensor detects a system voltage of less than approximately 9 V for approximately 5 s.

U3503 Code - Control Module Input Power 'A' Circuit Intermittent/Erratic

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Code U3503 Information for Specific Makes

  • U3503 Buick Control Module Input Power 'A' Circuit Intermittent/Erratic
  • U3503 Cadillac Control Module Input Power 'A' Circuit Intermittent/Erratic
  • U3503 Chevrolet Control Module Input Power 'A' Circuit Intermittent/Erratic
  • U3503 GMC Control Module Input Power 'A' Circuit Intermittent/Erratic

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