2005 Honda Pilot P0325 Fault Code: Knock Sensor Circuit Issue and Wiring Repair Guide
My 2005 Honda Pilot is showing a P0325 diagnostic trouble code, indicating a knock sensor circuit fault. This issue originated years ago when rodent damage affected the soy-based insulation in the wiring harness. I initially repaired it by splicing in new wire, but the fix has failed after approximately 8 to 10 years. Currently, I need detailed information about the wiring route from the knock sensor (KS) to its connection point beneath and behind the air intake. While I have a replacement KS sub-wire, I am uncertain about the exact connection points and how the wire runs under the air intake assembly. Removing the air intake is not an option until I fully understand the assembly layout. I am seeking high-resolution images or diagrams showing the actual wiring connections, particularly at the junction where the knock sensor wire meets the main harness and connects to the Powertrain Control Module (PCM) terminal C42. A standard wiring diagram does not provide sufficient detail for safe removal and repair. Any guidance on this specific wiring path or recommended repair steps would be greatly appreciated.
I'm not entirely sure what you're looking for — the shielded wire (red/blue) from the knock sensor passes through connector C161. The connection between the knock sensor wire and the main harness leads to PCM terminal C42. I'm unclear about your specific need. Suggestion: Consider replacing the knock sensor with a new part #30531-RCA-A01, which is relatively inexpensive and widely available online. You can search for this part number on Google or automotive parts websites. Also, verify the resistance of the knock sensor when connected to terminal C42 — ensure you double-check that the PCM terminal is correctly identified before proceeding.