Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pinpoint Test Dg: Knock Sensor (KS)
2021 Ford Edge SE, 4WDSECTION Pinpoint Test Dg: Knock Sensor (KS)
WARNING: This page is about a different variant/trim than selected.
Normal Operation and Fault Conditions
Refer to the DTC Fault Trigger Conditions.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| PCM P0325:00 | Knock/Combustion Vibration Sensor "A" Circuit: No Sub Type Information | Sets when the PCM detects the voltage goes outside a calibrated level. The KS11 detects vibrations upon increase and decrease in engine RPM. The KS11 generates a voltage based on this vibration. The vehicle may need to be driven for several minutes to set this DTC. |
| PCM P0327:00 | Knock/Combustion Vibration Sensor "A" Circuit Low: No Sub Type Information | Sets when the PCM detects the voltage goes outside a calibrated level. The KS11 detects vibrations upon increase and decrease in engine RPM. The KS11 generates a voltage based on this vibration. The vehicle may need to be driven for several minutes to set this DTC. |
| PCM P0328:00 | Knock/Combustion Vibration Sensor "A" Circuit High: No Sub Type Information | Sets when the PCM detects the voltage goes outside a calibrated level. The KS11 detects vibrations upon increase and decrease in engine RPM. The KS11 generates a voltage based on this vibration. The vehicle may need to be driven for several minutes to set this DTC. |
| PCM P0330:00 | Knock/Combustion Vibration Sensor "B" Circuit: No Sub Type Information | Sets when the PCM detects the voltage goes outside a calibrated level. The KS21 detects vibrations upon increase and decrease in engine RPM. The KS21 generates a voltage based on this vibration. The vehicle may need to be driven for several minutes to set this DTC. |
| PCM P0332:00 | Knock/Combustion Vibration Sensor "B" Circuit Low: No Sub Type Information | Sets when the PCM detects the voltage goes outside a calibrated level. The KS21 detects vibrations upon increase and decrease in engine RPM. The KS21 generates a voltage based on this vibration. The vehicle may need to be driven for several minutes to set this DTC. |
| PCM P0333:00 | Knock/Combustion Vibration Sensor "B" Circuit High: No Sub Type Information | Sets when the PCM detects the voltage goes outside a calibrated level. The KS21 detects vibrations upon increase and decrease in engine RPM. The KS21 generates a voltage based on this vibration. The vehicle may need to be driven for several minutes to set this DTC. |
| PCM P130D:00 | Engine Knock/Combustion Performance - Forced Limited Power: No Sub Type Information | Sets when the KS system detects excessive pre-ignition. The KS voltage exceeds a maximum value greater than a calibrated number of times within a set time period when pre-ignition is present. Engine performance may be limited to protect the engine if this DTC is set. Diagnose all other Diagnostic Trouble Codes (DTCs) first. If no other Diagnostic Trouble Codes (DTCs) are present, verify no base engine concerns are present before continuing with diagnosis. |
Possible Sources
- Knock sensor circuitry concern
- Base engine concerns
- Cooling system concerns
- Fuel quality
- Positive crankcase ventilation (PCV) system concern
- Oil and filter maintenance concern
- Oil overfilled
- Excessive oil consumption
- Charge air cooler (CAC) restriction
- Spark plug
- Fuel injector
- Knock sensor (12A699)
- PCM (12A650)
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.