What Does P1307 Mean?
P1307 indicates the chassis acceleration sensor is sending an erratic or implausible signal to the powertrain control module. This sensor measures longitudinal or vertical vehicle body acceleration and is used by the misfire detection system to distinguish engine misfires from rough road surface inputs. When the signal is unreliable, the PCM cannot accurately detect misfires.
Common Causes
35%
Faulty chassis acceleration sensor (internal failure)
25%
Damaged or corroded wiring/connector to the sensor
20%
Sensor mounting bracket loose or broken
10%
Excessive electromagnetic interference affecting sensor signal
10%
PCM input circuit failure
Diagnostic Steps
1
Locate the chassis acceleration sensor (typically mounted on the vehicle body or frame) and inspect its mounting for looseness or damage.
2
Check the sensor connector for corrosion, bent pins, or moisture intrusion.
3
Monitor the chassis acceleration sensor PID in live data — it should show smooth variations corresponding to vehicle movement.
4
Measure the sensor signal voltage with a multimeter while gently tapping the vehicle body to verify proper response.
5
Inspect the wiring harness from the sensor to the PCM for chafing, opens, or shorts to ground.
Estimated Repair Cost
$100 - $400
Parts + labor, varies by vehicle and location
P1307 indicates the chassis acceleration sensor is sending an erratic or implausible signal to the powertrain control module. This sensor measures longitudinal or vertical vehicle body acceleration and is used by the misfire detection system to distinguish engine misfires from rough road surface inp...
The most common cause of P1307 (Chassis Acceleration Sensor Signal Malfunction) is: Faulty chassis acceleration sensor (internal failure)
Typical repair costs for P1307 range from $100 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
With a faulty chassis acceleration sensor, the misfire detection system may produce false misfire codes or fail to detect real misfires, potentially masking catalytic converter damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1307 to identify the root cause.
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Quick Info
Category
Powertrain
System
Engine Management / Misfire Detection
Difficulty
Type
Manufacturer
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