DTC P0325 Knock Sensor Module Performance. Cadillac Seville 1998

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 1998 🢒 Seville 🢒 Engine 🢒 Engine Controls - 4.0L and 4.6L 🢒 DTC P0325 Knock Sensor Module Performance

Engine Controls Components
Cell 20: Ignition Control (IC) Module
OBD II Symbol Description Notice
ESD Notice

Circuit Description

This diagnostic DTC is used to check the PCM and its Knock Sensor (KS) module. The PCM has stored a calibrated time that it considers to be a valid spark knock duration. If the PCM sees a knock event that was longer in duration than the acceptable time, the PCM sets DTC P0325.

Conditions for Running the DTC

•	Engine run time greater than 30 seconds.

•	Ignition voltage 11 volts or more.

•	Engine speed greater than 600 rpm.

Conditions for Setting the DTC

The knock sensor reports a knock event longer than 99.99 milliseconds for 3 seconds continuously.

Action Taken When the DTC Sets

Ignition control uses the 87 octane spark advance.

•	The PCM will illuminate the malfunction indicator lamp (MIL) when the diagnostic runs and fails.

•	The PCM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame and Failure Records.

Conditions for Clearing the MIL/DTC

•	The PCM will turn the MIL OFF after three consecutive drive trips that the diagnostic runs and does not fail.

•	A Last Test Failed (current) DTC will clear when the diagnostic runs and does not fail.

•	A History DTC will clear after forty consecutive warm-up cycles with no failures of any emission related diagnostic test.

•	Use a scan tool to clear DTCs.

•	Interrupting PCM battery voltage may or may not clear DTCs. This practice is not recommended. Refer to Clearing Diagnostic Trouble Codes in PCM Description and Operation.

Step	Action	Value(s)	Yes	No
1	Did you perform the Powertrain On-Board Diagnostic (OBD) System Check?	--	Go to Step 2	Go to Powertrain On Board Diagnostic (OBD) System Check
2	Turn the key to LOCK. Remove Knock Sensor (KS) module from PCM. Insert known good knock sensor module. Connect a scan tool. Using Failure Rec. snapshot data duplicate conditions under which DTC P0325 originally set. Observe Fail This Ign.. Does DTC P0325 reset?	--	Go to Step 3	Go to Step 4
3	Replace the PCM. Refer to Powertrain Control Module Replacement . Is the replacement complete?	--	Go to Powertrain Control Module Diagnosis for Verify Repair	--
4	Replace the KS module. Refer to Knock Sensor Module Replacement . Is the replacement complete?	--	Go to Powertrain Control Module Diagnosis for Verify Repair	--