What Does C1457 Mean?
This code indicates the front accelerometer signal circuit is shorted to ground, pulling the signal line to 0V. The ABS/ESC module detects that the accelerometer output is at or near ground potential when it should be at approximately 2.5V at rest. This is a definitive electrical fault rather than a sensor performance issue, and typically results from physical wiring damage.
Common Causes
40%
Accelerometer signal wire insulation worn through from vibration contact with a body panel edge or frame bracket, creating a direct short to chassis ground
25%
Water intrusion into the accelerometer connector creating a conductive path between the signal pin and ground pin
20%
Front accelerometer internal failure with the MEMS output driver shorted to the ground rail on the sensor PCB
15%
Rodent damage to the accelerometer wiring harness where chewed insulation exposes the signal wire to grounded harness shield or nearby ground wires
Diagnostic Steps
1
Step 1: Disconnect the front accelerometer and measure resistance from the signal pin to chassis ground at the sensor connector (harness side). If less than 100 ohms, the short is in the wiring between the connector and the ABS module.
2
Step 2: If the harness tests clean, reconnect the sensor and measure from the signal pin at the ABS module connector to ground. A short present only when the sensor is connected confirms an internal sensor fault.
3
Step 3: Visually inspect the harness routing from the accelerometer to the ABS module. Focus on floor pan penetrations, clip attachment points, and areas near heat sources where insulation degradation is common.
4
Step 4: Check for evidence of water pooling in the area around the sensor connector. If the sensor is mounted in a low area near the rocker panel or floor pan, verify that drain holes are clear and that no body seam sealant is missing.
5
Step 5: Repair any wiring damage with sealed solder splices. Reroute the harness away from sharp edges and apply additional wire loom or split convoluted tubing for protection. Clear codes and verify the signal returns to approximately 2.5V at rest.
Estimated Repair Cost
$80 - $500
Parts + labor, varies by vehicle and location
This code indicates the front accelerometer signal circuit is shorted to ground, pulling the signal line to 0V. The ABS/ESC module detects that the accelerometer output is at or near ground potential when it should be at approximately 2.5V at rest. This is a definitive electrical fault rather than a...
The most common cause of C1457 (Accelerometer Front Circuit Short To Ground) is: Accelerometer signal wire insulation worn through from vibration contact with a body panel edge or frame bracket, creating a direct short to chassis ground
Typical repair costs for C1457 range from $80 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
A grounded accelerometer signal provides false zero-G data to the stability control system, which will disable ESC to prevent incorrect interventions. This eliminates the vehicle's automatic stability correction during emergency maneuvers.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1457 to identify the root cause.
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Quick Info
Category
Chassis
System
ABS / Electronic Stability Control
Difficulty
Type
Manufacturer
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