Engine-Codes - Cadillac - B1543 CADILLAC

B1543 CADILLAC - Oil Temperature Circuit Open

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

B1543 CADILLAC Possible 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)

How is the B1543 CADILLAC code repair?

Start by checking 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's pins.

What is the cost to diagnose the B1543 CADILLAC code

Labor: 1.0

The cost to diagnose the B1543 CADILLAC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

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

B1543 CADILLAC Meaning

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.

More Information

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