Engine-Codes - Cadillac - B1543 Cadillac

B1543 Cadillac Code - Oil Temperature Circuit Open

- Code Popularity: 661 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC B1543 Cadillac?

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 Oil Temperature Sensor
  • Oil Temperature Sensor harness is open or shorted
  • Oil Temperature Sensor circuit poor electrical connection
  • Faulty Instrument Panel Cluster (IPC)
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How to Fix the DTC B1543 Cadillac?

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 B1543 Cadillac 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 B1543 Cadillac Code Mean?

The Instrument Panel Cluster (IPC) supplies a 5-volt reference signal to Oil Temperature Sensor. When engine oil is cold, sensor resistance will decrease, and IPC reference voltage level will drop. IPC measures reference voltage change and displays the calculated value on the oil pressure gauge.

B1543 Cadillac Code - Oil Temperature Circuit Open

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