DTC P0327

DTC P0327  : Knock Sensor 1 (Bank 1) Circuit Low Voltage

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   - 3. Turn the vehicle to the OFF (LOCK) mode.

   - 4. Turn the vehicle to the ON mode.

   - 5. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P0327 Knock Sensor 1 (Bank 1) Circuit Low Voltage

   Is DTC P0327 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the knock sensor and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

2. Determine possible failure area (knock sensor, others)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connector.

   Knock sensor 1 (Bank 1) 2P connector

   - 3. Turn the vehicle to the ON mode.

   - 4. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P0328 Knock Sensor 1 (Bank 1) Circuit High Voltage

   Is DTC P0328 indicated?

   YES 

   Replace knock sensor 1 (Bank 1) .

   NO 

   Go to step 3.

3. Shorted wire check (KSB1/KS B1 line, KSSGB1 line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Jump the SCS line with the HDS.

   - 3. Disconnect the following connector.

   PCM connector C (51P) - Refer to: How to Troubleshoot the A/T System (2014 2015), or How to Troubleshoot the Fuel and Emissions Systems, or How to Troubleshoot the Brake Booster Pressure Monitoring System (2016 2017 2018 2019 2020), or How to Troubleshoot the Fuel and Emissions Systems(With Auto Idle Stop System) (2016)

   - 4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector C (51P) disconnected
   	Knock sensor 1 (Bank 1) 2P connector: disconnected
   Test circuit	KS B1, KSSGB1
   Test point 1	Knock sensor 1 (Bank 1) 2P connector No. 1 (GRN)
   Test point 2	Knock sensor 1 (Bank 1) 2P connector No. 2 (RED)

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Repair a short between the KSB1/KS B1 wire and the KSSGB1 wire.

   NO 

   Go to step 4.

4. Shorted wire check (KSB1/KS B1 line)

   -1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector C (51P) disconnected
   	Knock sensor 1 (Bank 1) 2P connector: disconnected
   Test circuit	KS B1
   Test point 1	Knock sensor 1 (Bank 1) 2P connector No. 2 (RED)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Repair a short in the KSB1/KS B1 wire between the PCM (C41) and knock sensor 1 (Bank 1).

   NO 

   The KSB1/KS B1 wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM - Refer to: PCM Removal and Installation (2016), or PCM Removal and Installation (2014 2015) .