P0335

CIRCUIT DESCRIPTION
The crankshaft position (CKP) sensor signal indicates the crankshaft speed and position. The CKP sensor circuits are connected directly to the powertrain control module (PCM) and consists of the following circuits:
- The 12-volt reference circuit
- The low reference circuit
- The CKP sensor signal circuit

If the PCM detects there is no signal from the CKP sensor for 8 seconds, DTC P0335 sets.

CONDITIONS FOR RUNNING THE DTC
- DTCs P0101, P0102 , P0103, P0341, P0342, or P0343 are not set.
- The camshaft position (CMP) sensor signal is incrementing.
- The mass air flow (MAF) is more than 3 g/s.
- The ignition switch is in the Crank position.

CONDITIONS FOR SETTING THE DTC
The PCM detects there is no signal from the CKP sensor 8 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDS
The following conditions may cause this DTC to set:
- Excessive air gap between the CKP sensor and the reluctor wheel
- Crankshaft reluctor wheel damage or improper installation
- The CKP sensor coming in contact with the reluctor wheel
- Foreign material passing between the CKP sensor and the reluctor wheel
- Insufficient fuel

Excess crankshaft end play causes the CKP sensor reluctor wheel to move out of alignment with the CKP sensor. This could result in any one of the following conditions:
- A no start
- A start and stall
- Erratic performance

For an intermittent, refer to Intermittent Conditions. Intermittent Conditions

TEST DESCRIPTION

Steps 1-2:

Steps 3-6:

Steps 7-9:

Steps 10-15:

Steps 16-17:

The numbers below refer to the step numbers on the diagnostic table.
3. This step determines if the fault is present.
6. This step simulates a CKP sensor signal to the PCM. If the PCM receives the signal, the fuel pump will operate for about two seconds.