Engine-Codes - Buick - B393B Buick

B393B Buick Code - Air Conditioning Compressor Valve Control Circuit

- Code Popularity: 1,409 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code B393B Buick?

  • Faulty Air Conditioning Compressor Valve
  • Air Conditioning Compressor Valve harness is open or shorted
  • Air Conditioning Compressor Valve circuit poor electrical connection
  • Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

|How to Fix the B393B Buick Code?

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 Code B393B Buick?

Labor: 1.0

The cost to diagnose the B393B Buick code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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|What are Code B393B Buick Possible Symptoms?

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

|What Does the B393B Buick Code Mean?

This A/C system uses a conventional clutch to engage and mechanically turn the compressor and a variable displacement solenoid valve to alter the amount of displacement created by the turning of the compressor. The Heating, Ventilation, and Air Conditioning (HVAC) Control Module provides both switched battery voltage and a pulse width modulated ground to the variable displacement solenoid valve. When the A/C switch is pressed, the HVAC Control Module grounds the variable displacement solenoid using a Pulse Width Modulation (PWM) signal in order to determine the amount of compressor displacement. The performance of the A/C compressor is based on adjusted interior temperature and engine load. The Diagnostic Trouble Code (DTC) sets when a PWM greater than 10% is sent but no current is read back.

Air Conditioning Compressor Valve Control Circuit

|Need more Information on the B393B Buick Code?

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|Need Help with the B393B Buick Code?

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