DTC P0325 Knock Sensor Module Performance. Cadillac DeVille 1996

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 1996 🢒 DeVille 🢒 Engine 🢒 Engine Controls - 4.0L and 4.6L 🢒 DTC P0325 Knock Sensor Module Performance

Engine Controls Components
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 Setting the DTC

Test Conditions

•	Test continuously.

•	Ignition voltage 11 volts or more.

Failure Condition

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) after two consecutive drive trips that the diagnostic runs and fails.

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

•	A first failure of this DTC will store in Last Test Failed but not History.

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 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 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	Was the Powertrain On-Board Diagnostic (OBD) System Check performed?	--	Go to Step 2	Go to A Powertrain On Board Diagnostic (OBD) System Check
2	Turn the key to OFF. 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 PCM Replacement/Programming . Is the replacement complete?	--	Go to Powertrain Control Module Diagnosis for Verify Repair	--
4	Replace the KS module. Refer to Knock Sensor (KS) Module Replacement . Is the replacement complete?	--	Go to Powertrain Control Module Diagnosis for Verify Repair	--