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.
1995 Acura 2.5TLFACTORY OEM SERVICE PROCEDURE
Code P0328 - Front Knock Sensor High Input
- Connect and operate scan tester, following manufacturer's instructions. Clear codes. Turn ignition on. Retrieve codes. If Code P0328 appears, go to next step. If Code P0328 does not appear, problem is intermittent. Inspect for loose sensor, poor connections, or loose wires associated with front knock sensor, then repair as necessary.
- Turn ignition off. Unplug front knock sensor connector. Measure resistance between sensor terminal and ground. If resistance is 504-616 ohms, go to next step. If resistance is not 504-616 ohms, replace knock sensor.
- Reconnect wiring to knock sensor. Measure resistance between 12-pin ECM connector terminal No. 2 (Red/Blue wire) and 26-pin ECM terminal A26 (Brown/Black wire). If resistance is not 504-616 ohms, repair open Red/Blue wire between knock sensor and ECM. If resistance is 504-616 ohms, temporarily substitute known good ECM, then retest system.
Factory Service Tools
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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.