DTC P0335 Crankshaft Position (CKP) Sensor Circuit. Chevrolet Chevy P32 RV/Van Chassis 1999

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1999 🢒 Chevy P32 RV/Van Chassis 🢒 DTC 🢒 DTC P0335 Crankshaft Position (CKP) Sensor Circuit

Engine Controls Components
Cell 22: CKP and Injection Timing Stepper Motor
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice

Circuit Description

The crankshaft position sensor is a Hall-effect type of sensor which monitors the crankshaft position and the speed. There are four teeth 90 degrees apart on the front of the crankshaft sprocket which induce a pulse in the sensor which is transmitted to the PCM. There is a physical one to one correspondence between the pump cam and the crankshaft.

Conditions for Running the DTC

The engine is operating.

Conditions for Setting the DTC

•	Eight consecutive crank pulses are missing.

•	An average of eight consecutive crank pulses are missing.

Action Taken When the DTC Sets

•	The PCM illuminates the malfunction indicator lamp (MIL) on the first drive trip the diagnostic runs and fails.

•	The PCM records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, this information is stored in the Freeze Frame and/or Failure Records.

Conditions for Clearing the MIL/DTC

•	The PCM will turn the MIL off after three consecutive trips without a fault condition.

•	A History DTC will clear after forty consecutive engine warm up cycles, if this or any other emmision related diagnosic does not report any failures.

•	Use of a scan tool will clear the DTC codes.

Diagnostic Aids

When the PCM is in backup fuel, long crank times, fast idle and poor performance conditions will exist. Check for a good connection at the crankshaft position sensor and at the PCM. Many intermittent problems are caused by poor electrical connections or wiring. When attempting to diagnose an intermittent problem, always begin by trying to reproduce the conditions under which the failure occurs. This usually involves raising the engine to a higher temperature or operating the engine near the RPM where the problem occurs. Since heat and vibration are often the cause of the intermittent, this may bring out the failure.

Test Description

Number(s) below refer to the step number(s) on the Diagnostic Table.

This step will determine if DTC P0335 is the result of a hard failure or an intermittent condition.

This step checks the 5 volt reference circuit (the 5 volt reference may vary slightly).

This step checks the ground circuit.

Step	Action	Value(s)	Yes	No
1	Important: Before clearing any DTCs, use the scan tool Capture Info to save the Freeze Frame and Failure records for reference. The control module's data is deleted once the Clear Info function is used. 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	Start and idle the engine. Observe the Crank Ref. Missed display on the scan tool. Does the scan tool display the specified value?	8	Go to Step 4	Go to Step 3
3	The DTC is intermittent. If no additional DTCs are stored, refer to the Applicable DTC Table(s) first. Are any additional DTCs stored?	--	Go to the applicable DTC table	Go to Diagnostic Aids
4	Turn the ignition OFF. Disconnect the CKP sensor electrical connector. Turn the ignition ON leaving the engine OFF. With a J 39200 DMM, measure the voltage between the CKP 5 volt reference circuit and chassis ground. Is the voltage within the specified range?	4.8-5.2 V	Go to Step 5	Go to Step 8
5	Probe the sensor ground circuit using a J 35616-200 unpowered test lamp connected to B+. Is the test lamp ON?	--	Go to Step 6	Go to Step 9
6	Reconnect the CKP sensor. Back probe the CKP signal circuit at the PCM with a DMM J 39200 connected to ground. Crank the engine. Is the voltage within the specified value?	4.2-4.5 V	Go to Step 14	Go to Step 7
7	Is the voltage greater than the specified value?	4.2-4.5 V	Go to Step 12	Go to Step 11
8	Turn the ignition OFF. Disconnect the PCM, and check the CKP 5 volt reference circuit for an open, short to ground, or short to the sensor ground circuit. If the CKP 5 volt reference circuit is open or shorted to ground, repair it as necessary. Refer to Wiring Repairs . Did you perform a repair?	--	Go to Step 17	Go to Step 10
9	Check for an open or a proper sensor ground terminal connection at the PCM. If a problem is found, repair the problem as necessary. Refer to Wiring Repairs . Did you perform a repair?	--	Go to Step 17	Go to Step 16
10	Check the CKP 5 volt reference circuit for a proper connection at the PCM and replace the terminal if necessary. Refer to Wiring Repairs . Did the terminal require replacement?	--	Go to Step 17	Go to Step 16
11	Turn the ignition OFF. Disconnect the PCM and check the CKP signal circuit for an open, short to ground, or short to the sensor ground circuit. Check the terminal connections at the CKP sensor for damage or a poor connection. If a problem is found, repair the problem as necessary. Refer to Wiring Repairs . Did you perform a repair?	--	Go to Step 17	Go to Step 15
12	Disconnect the CKP sensor pigtail connector. Turn the ignition ON leaving the engine OFF. With the J 39200 DMM connected to ground, probe the CKP signal circuit at the engine harness connector. Is there voltage present on the CKP sensor signal circuit?	--	Go to Step 13	Go to Step 14
13	Repair the short to voltage on the CKP sensor signal circuit. Refer to Wiring Repairs . Is the action complete?	--	Go to Step 17	--
14	Check the CKP signal circuit for a proper connection at the PCM and replace the terminal if necessary. Refer to Wiring Repairs . Did the terminal require replacement?	--	Go to Step 17	Go to Step 16
15	Replace the Crankshaft position sensor. Refer to Crankshaft Position Sensor Replacement . After replacing the sensor, the PCM must be programmed with a new TDC Offset. Refer to Fuel Injection Pump Top Dead Center Offset Adjustment . Is the action complete?	--	Go to Step 17	--
16	Important: The new PCM must be programmed. Refer to Powertrain Control Module Replacement/Programming . Replace the PCM. Is the action complete?	--	Go to Step 17	--
17	Using the scan tool, clear the DTCs. Start the engine. Allow the engine to idle until the engine reaches normal operating temperature. Select DTC and the Specific DTC function. Enter the DTC number which was set. Operate the vehicle, with the Conditions for Setting this DTC, until the scan tool indicates the diagnostic Ran. Does the scan tool indicate the diagnostic Passed?	--	Go to Step 18	Go to Step 2
18	Does the scan tool display any additional undiagnosed DTCs?	--	Go to the applicable DTC table	System OK