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.
Sensor, Knock: Removal
The forward sensor (1) is known to the Powertrain Control Module (PCM) as knock sensor 1. The rear sensor (3) is known to the PCM as knock sensor 2.
- Perform the fuel pressure release procedure. Refer to FUEL DELIVERY, GAS, STANDARD PROCEDURE .
- Disconnect and isolate the negative battery cable.
- Drain the cooling system. Refer to STANDARD PROCEDURE .
- Remove the air cleaner housing assembly, upper and lower intake manifolds and the oil filter housing. Refer to HOUSING, OIL FILTER, REMOVAL .
- Remove the electrical connector (4).NOTE:
There may be a foam strip on the bolt threads. This foam is used only to retain the bolts to the sensors for plant assembly. It is not used as a sealant. Do not apply any adhesive, sealant or thread locking compound to these bolts.
- Remove the mounting bolt (2) and knock sensor 1 (1) or knock sensor 2 (3).
Use the Manual With the Right Hardware
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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.
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