B2990 Code - A/C Compressor Driving Circuit
Quick Answer
The Climate Control Unit monitors the A/C Compressor Motor. Common causes include Faulty A/C Compressor Motor, A/C Compressor Motor harness is open or shorted, A/C Compressor Motor 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
- B2990 indicates A/C Compressor Driving Circuit.
- Common causes
- Common causes include Faulty A/C Compressor Motor, A/C Compressor Motor harness is open or shorted, A/C Compressor Motor 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.
Code B2990 Description
What are the Possible Causes of the DTC B2990?
- Faulty A/C Compressor Motor
- A/C Compressor Motor harness is open or shorted
- A/C Compressor Motor circuit poor electrical connection
How to Fix the DTC B2990?
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 B2990 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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Information for Specific Makes
- B2990 Acura — A/C Compressor Driving Circuit
- B2990 Honda — A/C Compressor Driving Circuit
Frequently Asked Questions about B2990 Code
1. What does the OBDII code B2990 mean?
B2990 indicates an issue with the A/C compressor driving circuit, which is responsible for controlling the operation of the air conditioning compressor.
2. What are the common symptoms of code B2990?
Symptoms may include the air conditioning not working, reduced cooling performance, or the A/C compressor not engaging.
3. What causes the B2990 code to appear?
Common causes include a faulty A/C compressor, damaged wiring in the compressor circuit, a defective relay, or an issue with the HVAC control module.
4. How do I diagnose code B2990?
Start by inspecting the A/C compressor wiring and connectors for damage or corrosion. Check the compressor relay and test the circuit for continuity. Scan the HVAC system for additional codes.
5. Can a faulty A/C compressor trigger code B2990?
Yes, a malfunctioning A/C compressor or internal failure can cause this code to appear.
6. Is it safe to drive with code B2990?
Yes, but your air conditioning system may not function properly, which can be uncomfortable in hot weather.
7. How do I fix the B2990 code?
Repairs may include replacing a damaged A/C compressor, fixing or replacing faulty wiring, replacing a defective relay, or reprogramming the HVAC control module.
8. Can a low refrigerant level cause the B2990 code?
While low refrigerant may affect A/C performance, it typically does not directly trigger this code, which is related to the electrical circuit.
9. How much does it cost to repair code B2990?
Repair costs vary depending on the issue, ranging from $50 for simple wiring repairs to $1,000 or more for A/C compressor replacement.
10. Can I clear the B2990 code without fixing the problem?
You can clear the code temporarily, but it will likely return unless the underlying issue is resolved.
Discuss the causes and fixes for B2990 OBDII Code
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