The CKP sensor is a magnetic generator type sensor, producing an alternating current signal. The CKP sensor signal increases in both frequency and amplitude as the engine RPM increases. The CKP sensor reluctor has 34 teeth and is mounted on the crankshaft behind the timing chain cover and the crankshaft pulley. When the crankshaft rotates, the CKP sensor signal rotor teeth pass by the CKP sensor causing a fluctuation in the sensors magnetic field. The fluctuation in the magnetic field induces a voltage in the CKP sensor circuitry that corresponds to every 10 degrees of crankshaft rotation. The reluctor has one wide tooth that indicates top dead center (TDC) of the number 1 cylinder. With the information that the PCM receives from the CKP sensor, the PCM determines engine speed and crankshaft position. There will be no spark or fuel delivery if there is no CKP sensor signal.

P0335

P0339

P0335

P0339

The CKP sensor input is not continuous after the engine is running.

DTCs P0335 and P0339 are Type A DTCs.

DTCs P0335 and P0339 are Type A DTCs.

The following conditions could also set the DTCs:

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Electronic Ignition (EI) System Description

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Important: If you were sent here from Engine Cranks but Does Not Run, proceed to Circuit/System Testing.

1. Attempt to start the engine, observe the DTC information with a scan tool. DTC P0335 and P0339 should not set.
2. Engine cranking, observe the scan tool Engine Speed parameter. The reading should indicate a steady 200-300 RPM while cranking.
3. Move related harnesses/connectors of the CKP sensor and verify the engine does not stumble, stall, or change engine speed.
4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Important: If the CKP sensor lead is damaged in any way, replace the CKP sensor.

1. Ignition OFF, disconnect the harness connector at the CKP sensor.
2. Ignition OFF, test for less than 10 ohms between the low reference circuit terminal 2 and ground G104.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the PCM.

3. Engine cranking, test for 1.4-1.6 volts AC between the signal circuit terminal 1 and the low reference circuit terminal 2.

⇒	If less than the specified range, test the applicable circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the PCM.

⇒	If greater than the specified range, test the applicable circuit for a short to voltage. If the circuit tests normal, replace the PCM.

4. If all circuits test normal, test or replace the CKP sensor.

Important: If the CKP sensor lead is damaged in any way, replace the CKP sensor.

1. Ignition OFF, disconnect the harness connector at the CKP sensor.
2. Test for 1,850-2,450 ohms at 20°C (68°F) between the signal terminal 1 and low reference terminal 2:

⇒	If not within the specified range, replace the CKP sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.