AutoCodes – Buick – P1534 Buick

P1534 Buick Code - A/C High Side Temperature Sensor Low Voltage

Quick Answer

The Heating, Ventilation, and Air Conditioning (HVAC) Control Module monitors the evaporator temperature via the evaporator temperature sensor. Common causes include Faulty A/C High Side Temperature Sensor, A/C High Side Temperature Sensor harness is open or shorted, A/C High Side Temperature Sensor circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P1534 Buick indicates A/C High Side Temperature Sensor Low Voltage.
Common causes: Common causes include Faulty A/C High Side Temperature Sensor, A/C High Side Temperature Sensor harness is open or shorted, A/C High Side Temperature Sensor circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 2,957

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 29, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1534 Buick Description

The Heating, Ventilation, and Air Conditioning (HVAC) Control Module monitors the evaporator temperature via the evaporator temperature sensor. When the air is cold, the sensor resistance and signal voltage are high. When the air is warm, the sensor resistance and signal are low.

OBDII Code P1534 Buick - A/C High Side Temperature Sensor Low Voltage - AutoCodes.com — P1534 Buick Code - A/C High Side Temperature Sensor Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1534 Buick?

Faulty A/C High Side Temperature Sensor
A/C High Side Temperature Sensor harness is open or shorted
A/C High Side Temperature Sensor circuit poor electrical connection

How to Fix the DTC P1534 Buick?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1534 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.