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.
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HOMESERVICE MANUALSFORD2019EXPLORER LIMITED, 3.5L ENG VIN 8, AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS (EXCEPT DIESEL & HYBRID) - DTC P0234 - P0606DTC P033A - KNOCK/COMBUSTION VIBRATION SENSOR D CIRCUIT
2019 Ford Explorer Limited, 3.5L Eng VIN 8, AWD
DTC P033A - Knock/Combustion Vibration Sensor D Circuit
2019 Ford Explorer Limited, 3.5L Eng VIN 8, AWDSECTION DTC P033A - Knock/Combustion Vibration Sensor D Circuit
DTC DESCRIPTION P033A - KNOCK/COMBUSTION VIBRATION SENSOR D CIRCUIT
| Description: This DTC sets when the voltage goes outside a calibrated level. The knock sensor 22 (KS22) detects vibrations upon increase and decrease in engine RPM. The KS22 sensor generates a voltage based on this vibration. | |||
Possible Causes:
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| Diagnostic Aids:
A KS22 sensor voltage greater than 0.5 volt with the ignition ON, engine OFF, indicates a concern is present. The vehicle may need to be driven for several minutes to set this DTC. |
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| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST DG . | ||
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.