Engine-Codes - Cadillac - P1538 CADILLAC

P1538 CADILLAC - A/C Request Circuit High Voltage

Repair Importance Level: 1/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P1538 CADILLAC Possible Causes

  • Faulty A/C Clutch Relay
  • A/C Clutch Relay harness is open or shorted
  • A/C Clutch Relay circuit poor electrical connection

How is the P1538 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 P1538 CADILLAC code

Labor: 1.0

The cost to diagnose the P1538 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.
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Possible Symptoms

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

P1538 CADILLAC Meaning

The Powertrain Control Module (PCM) activates the A/C clutch relay when the PCM detects an A/C request. Voltage is present at both the A/C compressor clutch and the A/C clutch status terminal at the PCM when the relay is activated.

More Information

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