B27B9 Code - Electric Compressor Overheat
Quick Answer
The Diagnostic Trouble Code (DTC) sets when the inverter temperature exceeds the standard value. Common causes include Refrigerant Charge, Faulty Electric Compressor, Electric Compressor harness is open or shorted. 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
- B27B9 indicates Electric Compressor Overheat.
- Common causes
- Common causes include Refrigerant Charge, Faulty Electric Compressor, Electric Compressor harness is open or shorted.
- 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.
Code B27B9 Description
What are the Possible Causes of the DTC B27B9?
- Refrigerant Charge
- Faulty Electric Compressor
- Electric Compressor harness is open or shorted
- Electric Compressor circuit poor electrical connection
How to Fix the DTC B27B9?
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 B27B9 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 B27B9 code?
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Need Help with the Code?
Get the B27B9 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- B27B9 Infiniti — Electric Compressor Overheat
- B27B9 Nissan — Electric Compressor Overheat
Frequently Asked Questions about B27B9 Code
1. What are the common symptoms of OBDII code B27B9 (Electric Compressor Overheat)?
- Common symptoms include reduced cooling performance, strange noises coming from the compressor, and the AC system shutting off unexpectedly.
2. What causes the OBDII code B27B9 to trigger?
- This code is typically triggered when the electric compressor in the vehicle's AC system overheats due to excessive load, a faulty temperature sensor, or a malfunction in the compressor itself.
3. How can I diagnose the issue related to OBDII code B27B9?
- Diagnosis involves checking the compressor for signs of overheating, testing the temperature sensor for proper functionality, and inspecting the AC system for any other underlying issues that may be causing the problem.
4. What are some repair tips for addressing OBDII code B27B9?
- Repair tips include ensuring proper airflow to the compressor, checking and replacing the temperature sensor if necessary, and addressing any other issues in the AC system that may be contributing to the overheating.
5. Can driving with OBDII code B27B9 cause further damage to the vehicle?
- Continuing to drive with this code can potentially damage the electric compressor and other components of the AC system, leading to more costly repairs in the future.
6. How urgent is it to address OBDII code B27B9?
- It is recommended to address this code promptly to prevent further damage to the AC system and ensure optimal cooling performance in the vehicle.
7. Is it safe to reset the OBDII code B27B9 and continue driving?
- While resetting the code may temporarily clear the warning light, it is important to address the underlying issue causing the overheating to prevent further damage to the AC system.
8. Can a DIY enthusiast repair OBDII code B27B9 at home?
- Depending on the root cause of the issue, some DIY repairs such as checking airflow to the compressor or replacing a faulty temperature sensor may be possible for those with automotive repair experience.
9. How much does it typically cost to repair OBDII code B27B9 at a professional auto repair shop?
- The cost of repairs for this code can vary depending on the underlying issue, but it may involve labor costs for diagnosis and repair, as well as the cost of any replacement parts needed.
10. What is the best course of action if OBDII code B27B9 keeps reoccurring after repairs?
- If the code continues to reoccur after repairs, it is recommended to have a professional mechanic perform a thorough inspection to identify any underlying issues that may be causing the problem.
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