AutoCodes – Generic – B1422

B1422 Code - Compressor Lock Sensor Circuit

Quick Answer

The Engine Control Module (ECM) sends the engine speed signal to the Air Conditioning Amplifier assembly via CAN communication. Common causes include Faulty Cooler Compressor Assembly (A/C Lock Sensor), Compressor Assembly harness is open or shorted, Compressor Assembly circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1422 indicates Compressor Lock Sensor Circuit.
Common causes: Common causes include Faulty Cooler Compressor Assembly (A/C Lock Sensor), Compressor Assembly harness is open or shorted, Compressor Assembly circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 20,399

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 20, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1422 Description

The Engine Control Module (ECM) sends the engine speed signal to the Air Conditioning Amplifier assembly via CAN communication.
The Air Conditioning Amplifier assembly reads the difference between compressor speed and engine speed. When the difference becomes too large, the air conditioning amplifier assembly determines that the compressor is locked, and turns the magnet clutch off.
The Diagnostic Trouble Code (DTC) will be set when an open or short in the A/C lock sensor circuit is detected.

OBDII Code B1422 - Compressor Lock Sensor Circuit - AutoCodes.com — B1422 Code - Compressor Lock Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC B1422?

Faulty Cooler Compressor Assembly (A/C Lock Sensor)
Compressor Assembly harness is open or shorted
Compressor Assembly circuit poor electrical connection
Faulty Air Conditioning Amplifier

How to Fix the DTC B1422?

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 B1422 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.

Need more information about the B1422 code?

Need more information on how to fix the B1422 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1422 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1422 Lexus — Compressor Lock Sensor Circuit
B1422 Scion — Compressor Lock Sensor Circuit
B1422 Toyota — Compressor Lock Sensor Circuit

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.

Frequently Asked Questions about B1422 Code

1. What are the common symptoms of OBDII code B1422 (Compressor Lock Sensor Circuit)?

- Common symptoms include the air conditioning system not working properly, unusual noises coming from the compressor, and the A/C clutch not engaging.

2. What are the possible causes of OBDII code B1422?

- Possible causes include a faulty compressor lock sensor, damaged wiring or connectors in the sensor circuit, or issues with the A/C compressor itself.

3. How can I diagnose the cause of OBDII code B1422?

- Diagnosing the issue involves checking the compressor lock sensor circuit for any visible damage, testing the sensor for proper functionality, and inspecting the A/C compressor for any issues.

4. Can I still drive my vehicle with OBDII code B1422?

- It is not recommended to drive your vehicle with this code as it can lead to further damage to the A/C system. It is best to address the issue promptly.

5. How can I repair OBDII code B1422?

- Repairing this code may involve replacing the compressor lock sensor, repairing or replacing damaged wiring or connectors, or addressing any issues with the A/C compressor.

6. Are there any DIY tips for fixing OBDII code B1422?

- DIY tips include checking the sensor and wiring for visible damage, ensuring all connections are secure, and consulting the vehicle's repair manual for specific guidance.

7. How much does it typically cost to repair OBDII code B1422?

- The cost of repair can vary depending on the specific issue and the labor rates in your area. It is recommended to get a diagnostic from a professional to determine an accurate estimate.

8. Can a faulty compressor lock sensor cause other issues besides OBDII code B1422?

- Yes, a faulty compressor lock sensor can cause other A/C-related issues such as poor cooling performance, compressor failure, and increased fuel consumption.

9. Will resetting the OBDII code B1422 make the problem go away?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the code to trigger. It's important to diagnose and repair the problem.

10. How long does it take to repair OBDII code B1422?

- The repair time can vary depending on the extent of the issue and the availability of parts. It is best to consult with a professional technician for an accurate estimate of the repair time.