Quick Answer
B0656 means: B0656 indicates an issue with the A/C refrigerant pressure sensor circuit.
Can I drive with B0656? It's advisable to address this issue promptly to avoid expensive repairs.
Common Questions
What does B0656 mean and how does it affect my car?
DTC B0656 indicates a problem with the A/C refrigerant pressure sensor circuit, which can lead to inefficient cooling or complete A/C failure, particularly affecting comfort during hot weather.
What are the most common causes of B0656 and how much does it cost to fix?
Common causes include a faulty refrigerant pressure sensor, damaged wiring, or refrigerant leaks. Repair costs can range from $100 for a sensor replacement to over $600 for compressor issues.
Can I drive my car with B0656 or should I stop immediately?
While you may still be able to drive your vehicle, it’s advisable to address the B0656 code promptly to avoid severe A/C system damage and higher repair costs.
How can I diagnose B0656 myself using GeekOBD APP?
You can use the GeekOBD APP to scan for trouble codes, review freeze frame data, and monitor the A/C system's performance, helping you pinpoint issues related to B0656.
What vehicles are most commonly affected by B0656?
DTC B0656 is commonly reported in vehicles like the 2013-2017 Ford Fusion, 2014-2018 Chevrolet Malibu, and similar models, particularly those with A/C system complexities.
How can I prevent B0656 from happening again?
Regularly check your A/C system for leaks, ensure proper refrigerant levels, and consider having your A/C serviced every 1-2 years to maintain optimal performance.
What is B0656?
DTC B0656 is a diagnostic trouble code that indicates a problem with the vehicle's air conditioning (A/C) system, specifically related to the A/C refrigerant pressure sensor circuit. This code often arises when there is an issue with the sensor itself, the wiring, or the related components. In simple terms, your car's computer has detected that the refrigerant pressure is outside the expected range, which can lead to inefficient cooling and potential damage to the A/C system. For many drivers, especially owners of vehicles like the 2013-2017 Ford Fusion or 2014-2018 Chevrolet Malibu, this can mean an uncomfortable ride during hot weather and increased repair costs if not addressed promptly. Symptoms can include the A/C not blowing cold air, unusual noises from the A/C compressor, or fluctuating cabin temperatures. Ignoring this code can lead to more severe issues, such as compressor failure, which can be significantly more expensive to repair. It's crucial to diagnose and fix the underlying issue to ensure your A/C system operates efficiently and reliably.
System: B - Body (Airbags, Lighting, Security, Climate Control)
Symptoms
Common symptoms when B0656 is present:
- The A/C system fails to provide cold air, making for an uncomfortable drive, especially in warm weather.
- Unusual noises coming from the A/C compressor, which may indicate internal mechanical issues.
- The cabin temperature fluctuates unexpectedly, suggesting improper refrigerant levels.
- The A/C warning light may illuminate on the dashboard, signaling a malfunction.
- In some cases, the vehicle may exhibit reduced engine performance due to the A/C system drawing excessive power.
Possible Causes
Most common causes of B0656 (ordered by frequency):
- The most common cause of DTC B0656 is a faulty A/C refrigerant pressure sensor, with a likelihood of around 60%. This sensor monitors the refrigerant pressure and sends data to the vehicle's computer. If it fails, it can trigger this code.
- Another possible cause is damaged wiring or poor connections in the sensor circuit, which can account for about 25% of cases. Corrosion or fraying can disrupt the signal sent to the engine control module (ECM).
- A refrigerant leak can also cause this code, leading to insufficient pressure readings. This issue can be prevented by regular A/C system checks and recharging the refrigerant every couple of years.
- Less commonly, a malfunctioning A/C compressor may trigger this code, affecting the overall system performance. This situation is serious and requires immediate attention.
- In rare cases, an issue with the vehicle's engine control module (ECM) may incorrectly report this code, though this is not typical.
B0656 Repair Costs
Cost Breakdown by Repair Type
A/C Refrigerant Pressure Sensor Replacement
Replacing the faulty sensor usually resolves the B0656 code.
- Total: $100 - $200
- Success rate: 90%
Wiring Repair
Repairing damaged wiring or connectors in the A/C circuit.
- Total: $50 - $150
- Success rate: 80%
A/C Compressor Replacement
In cases where the compressor is at fault, replacing it is necessary.
- Total: $600 - $1200
- Success rate: 75%
Money-Saving Tips for B0656
- Start with the most common and least expensive repairs first
- Use GeekOBD APP to confirm diagnosis before replacing expensive parts
- Consider preventive maintenance to avoid future occurrences
- Compare prices for OEM vs aftermarket parts based on your needs
- Address the issue promptly to prevent more expensive secondary damage
Diagnostic Steps
Professional B0656 Diagnosis Process
Follow these systematic steps to accurately diagnose B0656. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Conduct an initial visual inspection to check for any obvious signs of damage to wiring or connectors near the A/C pressure sensor
Step 1: Conduct an initial visual inspection to check for any obvious signs of damage to wiring or connectors near the A/C pressure sensor. This should take about 5-10 minutes.
Step 2: Step 2: Use an OBD2 scanner or the GeekOBD APP to retrieve the trouble codes and freeze frame data, gaining insights into the vehicle's conditions at the time the code was set
Step 2: Use an OBD2 scanner or the GeekOBD APP to retrieve the trouble codes and freeze frame data, gaining insights into the vehicle's conditions at the time the code was set. Expect this to take 10-15 minutes.
Step 3: Step 3: Perform component testing using a multimeter to check the A/C refrigerant pressure sensor and its circuit for proper voltage and continuity
Step 3: Perform component testing using a multimeter to check the A/C refrigerant pressure sensor and its circuit for proper voltage and continuity. This can take 20-30 minutes depending on accessibility.
Step 4: Step 4: After repairs, conduct a system function test to ensure the A/C operates correctly
Step 4: After repairs, conduct a system function test to ensure the A/C operates correctly. Clear any stored codes and recheck for faults. This should take about 10-15 minutes.
Step 5: Step 5: Finish with a road test to confirm that the A/C system is functioning properly under varying conditions, which can take 15-20 minutes
Step 5: Finish with a road test to confirm that the A/C system is functioning properly under varying conditions, which can take 15-20 minutes.
Important Notes
- Always verify the repair with GeekOBD APP after completing diagnostic steps
- Clear codes and test drive to ensure the problem is resolved
- Address underlying causes to prevent code recurrence
Real Repair Case Studies
Case Study 1: A/C System Repair in a 2015 Ford Fusion
Vehicle: 2015 Ford Fusion, 75,000 miles
Problem: Customer reported that the A/C was blowing warm air and the B0656 code was present.
Diagnosis: After a visual inspection and using the GeekOBD APP, a faulty A/C refrigerant pressure sensor was identified.
Solution: Replaced the A/C refrigerant pressure sensor and recharged the system.
Cost: $150 (sensor $100, labor $50)
Result: After repairs, the A/C system functioned correctly and the B0656 code was cleared.
Case Study 2: Wiring Issue in a 2016 Chevrolet Malibu
Vehicle: 2016 Chevrolet Malibu, 60,000 miles
Problem: Customer experienced fluctuating cabin temperatures and received the B0656 code.
Diagnosis: A thorough inspection revealed damaged wiring in the A/C pressure sensor circuit.
Solution: Repaired the damaged wiring and ensured secure connections.
Cost: $120 (labor $70, parts $50)
Result: Restored proper A/C function, and the B0656 code was eliminated.