AutoCodes – Generic – B2518

B2518 Code - Compressor Overtemp Fault

Quick Answer

The Body Control Module (BCM) monitors the Compressor. Common causes include Faulty Compressor, Compressor harness is open or shorted, Compressor 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: B2518 indicates Compressor Overtemp Fault.
Common causes: Common causes include Faulty Compressor, Compressor harness is open or shorted, Compressor 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 7,392

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 Dec 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B2518 Description

The Body Control Module (BCM) monitors the Compressor. The BCM sets the OBDII code when the Compressor is not to factory specifications.

OBDII Code B2518 - Compressor Overtemp Fault - AutoCodes.com — B2518 Code - Compressor Overtemp Fault

What does this mean?

What are the Possible Causes of the DTC B2518?

Faulty Compressor
Compressor harness is open or shorted
Compressor circuit poor electrical connection

How to Fix the DTC B2518?

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 B2518 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 B2518 code?

Need more information on how to fix the B2518 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2518 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2518 Chrysler — Left Rear Window Position Sensor 2 Circuit Performance
B2518 Dodge — Left Rear Window Position Sensor 2 Circuit Performance
B2518 Lexus — Open In Package Tray Motor 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 B2518 Code

1. What are the common symptoms of OBDII code B2518 (Compressor Overtemp Fault)?

The common symptoms of OBDII code B2518 include the air conditioning system not cooling efficiently, strange noises coming from the compressor, and the AC system shutting off unexpectedly.

2. What are the possible causes of OBDII code B2518 (Compressor Overtemp Fault)?

Possible causes of OBDII code B2518 include a faulty AC compressor, a refrigerant leak, a malfunctioning compressor clutch, or an issue with the compressor temperature sensor.

3. How can I diagnose OBDII code B2518 (Compressor Overtemp Fault)?

Diagnosing OBDII code B2518 involves using an OBDII scanner to retrieve the code, inspecting the AC compressor for damage or leaks, testing the compressor clutch, and checking the compressor temperature sensor for proper functioning.

4. What are some repair tips for fixing OBDII code B2518 (Compressor Overtemp Fault)?

Repair tips for OBDII code B2518 may include repairing or replacing a faulty AC compressor, fixing any refrigerant leaks, replacing the compressor clutch if necessary, and calibrating or replacing the compressor temperature sensor.

5. Can driving with OBDII code B2518 (Compressor Overtemp Fault) cause further damage to my vehicle?

Driving with OBDII code B2518 may lead to further damage to the AC system components, such as the compressor, if the underlying issue is not addressed promptly. It is recommended to address the problem as soon as possible to prevent additional damage.

6. How much does it typically cost to repair OBDII code B2518 (Compressor Overtemp Fault)?

The cost of repairing OBDII code B2518 can vary depending on the specific issue causing the fault. Costs may range from a few hundred to over a thousand dollars, depending on the extent of the repairs needed.

7. Is it safe to continue driving my vehicle with OBDII code B2518 (Compressor Overtemp Fault)?

It is not recommended to continue driving your vehicle with OBDII code B2518, as it can lead to further damage to the AC system components and potentially result in complete AC system failure. It is best to address the issue promptly.

8. Can I reset OBDII code B2518 (Compressor Overtemp Fault) with a simple reset tool?

Resetting OBDII code B2518 may temporarily clear the code, but it will not fix the underlying issue causing the fault. It is important to diagnose and repair the root cause of the problem to prevent the code from reoccurring.

9. How long does it typically take to repair OBDII code B2518 (Compressor Overtemp Fault)?

The repair time for OBDII code B2518 can vary depending on the specific issue and the expertise of the technician. In general, the repair may take a few hours to half a day, but it could take longer for more complex issues.

10. Can a DIY enthusiast fix OBDII code B2518 (Compressor Overtemp Fault) at home?

While some aspects of diagnosing OBDII code B2518 may be tackled by a DIY enthusiast, repairing the underlying issues, such as replacing the AC compressor or fixing refrigerant leaks, may require specialized tools and expertise best handled by a professional mechanic.