B0627 - Airbag Crash Sensor Circuit Malfunction in Ford and Chrysler Vehicles

Quick Answer

B0627 means: DTC B0627 signifies a malfunction in the airbag crash sensor circuit.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with B0627? Immediate attention is necessary to ensure passenger safety.

Common Questions

What does B0627 mean and how does it affect my car?

B0627 indicates a problem with the airbag crash sensor circuit, which is crucial for the airbag deployment during a crash. If this issue isn't resolved, your airbag may not deploy, significantly increasing injury risk in an accident.

What are the most common causes of B0627 and how much does it cost to fix?

Common causes include a faulty crash sensor (around $150 - $300), damaged wiring (approximately $80 - $200), or a failed airbag control module ($400 - $800). Each case varies, so diagnostics are essential.

Can I drive my car with B0627 or should I stop immediately?

Driving with B0627 is highly discouraged as it indicates a malfunction in the airbag system. This can lead to airbags not deploying during an accident, posing serious safety risks.

How can I diagnose B0627 myself using GeekOBD APP?

You can use the GeekOBD APP to perform a full vehicle scan, which will retrieve the B0627 code along with any related codes. Follow the app's instructions to check sensor performance and wiring integrity.

What vehicles are most commonly affected by B0627?

Commonly affected vehicles include the 2003-2007 Ford Expedition, 2005-2010 Chrysler 300, and 2004-2008 Chrysler Town & Country. It's advisable to check for any recalls or technical service bulletins regarding airbag systems.

How can I prevent B0627 from happening again?

Regular vehicle maintenance, including electrical system checks and ensuring wiring integrity, can help prevent B0627. Additionally, avoiding moisture exposure can protect the airbag system wiring from corrosion.

What is B0627?

The Diagnostic Trouble Code (DTC) B0627 indicates a malfunction in the airbag crash sensor circuit, specifically in vehicles such as the 2003-2007 Ford Expedition and 2004-2008 Chrysler Town & Country. This code is triggered when the onboard diagnostic system detects an issue with the communication or performance of the airbag system's sensors, which play a critical role in vehicle safety. In practical terms, this means that the airbag may not deploy in the event of a collision, increasing the risk of injury. The crash sensor circuit is responsible for detecting rapid deceleration or impacts, and if it fails, it can lead to a non-functional airbag system. This code requires immediate attention from a qualified technician, as ignoring it can compromise the safety features of your vehicle. It’s important to understand that while the vehicle may seem to operate normally, the absence of a functioning airbag system poses a significant risk during accidents. Regular maintenance and inspections of the airbag system are crucial, particularly in older models where wiring and sensors may degrade over time. Drivers should not delay addressing this issue, as it directly impacts passenger safety.

System: B - Body (Airbags, Lighting, Security, Climate Control)

Symptoms

Common symptoms when B0627 is present:

  • The airbag warning light remains illuminated on the dashboard, signaling a potential malfunction in the airbag system.
  • Inconsistent airbag deployment during testing or diagnostic procedures, indicating that the system may not work when needed.
  • There may be unusual noises or malfunctions in the dashboard, particularly when the ignition is turned on, which can be a sign of electrical issues.
  • An inability to reset the airbag system after repairs, suggesting persistent issues with the crash sensor circuit.
  • Increased vehicle diagnostics errors, as other codes may appear alongside B0627, indicating broader electrical or sensor-related problems.

Possible Causes

Most common causes of B0627 (ordered by frequency):

  1. The most common cause of code B0627 is a faulty crash sensor, which accounts for about 50% of cases. This can occur due to physical damage or wear over time.
  2. A second common cause is damaged wiring or poor connections in the airbag system, which can lead to electrical failures and signal loss within the circuit.
  3. Corrosion in connectors or terminals can also lead to B0627, often as a result of exposure to moisture or road salt, which can disrupt the signal transmission.
  4. Less frequently, software issues within the vehicle's airbag control module can trigger this code, requiring a software update or reprogramming.
  5. In rare cases, a complete failure of the airbag control module can occur, which is a serious and costly repair that may involve replacing the entire unit.

B0627 Repair Costs

Cost Breakdown by Repair Type

Replacing Crash Sensor

This involves removing and replacing the faulty crash sensor to restore proper function to the airbag system.

  • Total: $150 - $300
  • Success rate: 90%
Repairing Wiring Issues

This may include fixing damaged wires or connectors, which can often be done without replacing major components.

  • Total: $80 - $200
  • Success rate: 75%
Airbag Control Module Replacement

In cases of module failure, replacing the control module is necessary to restore airbag functionality.

  • Total: $400 - $800
  • Success rate: 85%
Money-Saving Tips for B0627
  • 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 B0627 Diagnosis Process

Follow these systematic steps to accurately diagnose B0627. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct an initial visual inspection of the crash sensor wiring and connectors for any visible damage, corrosion, or loose connections (5-10 minutes)

Step 1: Conduct an initial visual inspection of the crash sensor wiring and connectors for any visible damage, corrosion, or loose connections (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: Use the GeekOBD APP to perform an OBD2 scan, retrieving all diagnostic codes and freeze frame data to get context on the B0627 code (10-15 minutes)

Step 2: Use the GeekOBD APP to perform an OBD2 scan, retrieving all diagnostic codes and freeze frame data to get context on the B0627 code (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Test the crash sensor and related components using a multimeter to ensure they are within specified resistance ranges (20-30 minutes)

Step 3: Test the crash sensor and related components using a multimeter to ensure they are within specified resistance ranges (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: Perform a system function test after any repairs are made, ensuring that the airbag system operates correctly and clearing the codes (10-15 minutes)

Step 4: Perform a system function test after any repairs are made, ensuring that the airbag system operates correctly and clearing the codes (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Conduct a road test to confirm that the airbag system functions properly under various driving conditions, ensuring that the B0627 code does not return (15-20 minutes)

Step 5: Conduct a road test to confirm that the airbag system functions properly under various driving conditions, ensuring that the B0627 code does not return (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

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: Resolving B0627 in a 2005 Ford Expedition

Vehicle: 2005 Ford Expedition, 120,000 miles

Problem: Customer reported the airbag warning light was on and wanted to ensure the airbag system was functional.

Diagnosis: A scan revealed code B0627. Visual inspection found a damaged crash sensor due to corrosion.

Solution: Replaced the crash sensor and repaired wiring connections, then cleared the codes.

Cost: $250 (sensor $150, labor $100)

Result: After repairs, the airbag system functioned properly, and the warning light was cleared.

Case Study 2: Airbag Control Module Replacement on 2008 Chrysler Town & Country

Vehicle: 2008 Chrysler Town & Country, 95,000 miles

Problem: Customer experienced a persistent B0627 code and airbag warning light.

Diagnosis: Diagnostics confirmed a malfunctioning airbag control module that failed to communicate correctly.

Solution: Replaced the airbag control module and updated the software.

Cost: $600 (control module $500, labor $100)

Result: The vehicle's airbag system was restored to full functionality, with no further codes present.

Diagnose B0627

Use GeekOBD APP for professional diagnosis!

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  • Professional-grade analysis
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Code Information

Code: B0627
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes