Diagnostic Aids

WARNING: This page is about a different variant/trim than selected.

The KS must be torqued correctly. Refer to Knock Sensor (KS) 1 Replacement and Knock Sensor (KS) 2 Replacement .
The mounting between the sensor and engine must be free of burrs, casting flash, and foreign material.
The KS head is clear from hoses, brackets, and engine wiring.
If the KS is dropped, the KS must be replaced.
If the sensor lead is damaged in any way, the sensor must be replaced.
If there is any excessive engine mechanical noise, the DTC may set.
For an intermittent condition, refer to Intermittent Conditions .

DTC P0328 or P0333

Step	Action	Values	Yes	No
Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Control Module (ECM) Connector End Views or Engine Controls Connector End Views
1	Did you perform the Diagnostic System Check-Engine Controls?	-	Go to Step 2	Go to Diagnostic System Check - Engine Controls
2	IMPORTANT: If an engine knock or excessive mechanical noise can be heard, repair the engine mechanical condition before proceeding with this diagnostic. Refer to Symptoms - Engine Mechanical in Engine Mechanical. Observe the Freeze Frame/Failure Records data for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data. Does the DTC fail this ignition cycle?	-	Go to Step 3	Go to Diagnostic Aids
3	Turn OFF the ignition. Disconnect the affected KS. Refer to Knock Sensor (KS) 1 Replacement and Knock Sensor (KS) 2 Replacement . Turn ON the ignition, with the engine OFF. Measure the voltage from the signal circuit of the KS harness to a good ground with a DMM, on both sides of the harness connector. Measure the voltage from the low reference circuit of the KS harness to a good ground with a DMM, on both sides of the harness connector. Does the DMM display a voltage above the specified value on either circuit?	1.0 V	Go to Step 4	Go to Step 5
4	Repair the short to voltage in the faulty circuit. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 7	Go to Step 5
5	Test for an intermittent and for a poor connection at the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 7	Go to Step 6
6	Replace the ECM. Refer to Engine Control Module (ECM) Replacement . Did you complete the replacement?	-	Go to Step 7	-
7	Clear the DTCs with a scan tool. Turn the ignition OFF for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC run and pass?	-	Go to Step 8	Go to Step 2
8	With a scan tool, observe the stored information, Capture Info. Does the scan tool display any DTCs that you have not diagnosed?	-	Go to Diagnostic Trouble Code (DTC) List	System OK