Test Description

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

The numbers below refer to the step numbers on the diagnostic table.

4: This step tests for resistance of the CKP sensor and its lead.
5: This step inspects for electromagnetic interference in any of the CKP circuits.

DTC P0337

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 DTC P0335 sets, diagnose this DTC first. Attempt to start the engine.Does the engine start and run?	-	Go to Step 3	Go to Step 4
3	Observe the Freeze Frame/Failure Records 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. Does the DTC fail this ignition?	-	Go to Step 4	Go to Intermittent Conditions
4	Inspect all of the circuits going to the CKP sensor for the following: Routed too closely to other wiring or components Routed too closely to after-market add- on electrical equipment Routed too closely to solenoids, relays, and motors Did you find and correct the condition?	-	Go to Step 13	Go to Step 5
5	Disconnect the Engine Control Module (ECM) harness connector. Measure the resistance from the high circuit of the CKP sensor and the low circuit of the CKP sensor with a DMM. Is the resistance within the specified range?	700-1100 ohm	Go to Step 9	Go to Step 6
6	Test the CKP Sensor High Circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 13	Go toStep 7
7	Inspect for poor connections at the CKP sensor harness connector. 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 13	Go to Step 8
8	Inspect for poor connections at the engine control module (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 13	Go to Step 9
9	IMPORTANT: If the sensor lead is damaged in any way, DO NOT repair the lead. Remove the CKP sensor. Refer to Crankshaft Position (CKP) Sensor Replacement . Inspect the CKP sensor and the harness for the following conditions: Physical damage Excessive play or looseness Improper installation Foreign material passing between the CKP sensor and the reluctor ring Electromagnetic interference in the CKP sensor circuits Excessive air gap between the CKP sensor and the reluctor ring Did you find and correct the condition?	-	Go to Step 13	Go to Step 10
10	Inspect the reluctor ring for the following conditions: Physical damage Improper installation Excessive end play or looseness Refer to Diagnostic Aids and Crankshaft and Bearings Removal in Wiring Systems. Did you find and correct the condition?	-	Go to Step 13	Go to Step 11
11	Replace the CKP sensor. Refer to Crankshaft Position (CKP) Sensor Replacement . Did you find and correct the condition?	-	Go to Step 13	Go to Step 12
12	Replace the ECM. Refer to Engine Control Module (ECM) Replacement . Did you find and correct the condition?	-	Go to Step 13	-
13	Clear the DTCs with a scan tool. 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. Did the DTC fail this ignition?	-	Go to Step 2	Go to Step 14
14	Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed?	-	Go to Diagnostic Trouble Code (DTC) List	System OK