What Does B0094 Mean?
This code indicates the Airbag Control Module (ACM) has detected a fault in the center frontal impact sensor or its circuit. The subfault designation means the sensor is reporting an internal malfunction, incorrect signal voltage, or communication error. This sensor is critical for detecting frontal collisions and triggering airbag deployment at the appropriate threshold.
Safety Warning
This is a critical safety system fault that may prevent proper airbag deployment in a frontal collision, significantly increasing injury risk. The airbag warning light will be illuminated and the vehicle should not be driven until repaired as occupant protection is severely compromised.
Common Causes
45%
Faulty or damaged center frontal impact sensor with internal component failure
30%
Corroded or damaged wiring harness connections at the sensor connector
15%
Water intrusion or corrosion inside the sensor housing causing circuit degradation
10%
Airbag Control Module internal fault or software corruption
Diagnostic Steps
1
Step 1: Perform visual inspection of the center frontal impact sensor location (typically behind front bumper cover or radiator support) for physical damage, water intrusion, or loose mounting. Check sensor mounting for proper alignment and secure attachment.
2
Step 2: Disconnect the center frontal impact sensor connector and inspect pins for corrosion, bent terminals, or moisture. Use electrical contact cleaner and verify connector integrity. Check connector lock mechanism for proper engagement.
3
Step 3: Using a digital multimeter, measure resistance across sensor terminals (typically 2-5 ohms for accelerometer type sensors). Compare readings to manufacturer specifications. Also test for short to ground or short to power on sensor supply and signal wires.
4
Step 4: Measure voltage at sensor connector with ignition on (typically 5V reference voltage should be present). Verify ground circuit continuity to ACM with less than 0.5 ohms resistance. Check signal wire for excessive resistance or voltage drop.
5
Step 5: If sensor and wiring test within specifications, substitute with known-good sensor or perform ACM self-test function through scan tool diagnostic menu. Clear codes and perform test drive to verify repair.
6
Step 6: If fault persists with new sensor and verified wiring, test ACM power and ground circuits, then consider ACM replacement or reprogramming if available through manufacturer service procedures.
Estimated Repair Cost
$200 - $800
Parts + labor, varies by vehicle and location
This code indicates the Airbag Control Module (ACM) has detected a fault in the center frontal impact sensor or its circuit. The subfault designation means the sensor is reporting an internal malfunction, incorrect signal voltage, or communication error. This sensor is critical for detecting frontal...
The most common cause of B0094 (Center Frontal Restraints Sensor (Subfault)) is: Faulty or damaged center frontal impact sensor with internal component failure
Typical repair costs for B0094 range from $200 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This is a critical safety system fault that may prevent proper airbag deployment in a frontal collision, significantly increasing injury risk. The airbag warning light will be illuminated and the vehicle should not be driven until repaired as occupant protection is severely compromised.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B0094 to identify the root cause.
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Quick Info
Category
Body
System
Supplemental Restraint System (SRS/Airbag)
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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