Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P0335 Crankshaft Position Sensor "A" Circuit; DTC P0339 Crankshaft Position Sensor "A" Circuit Intermittent: Description
The Crankshaft Position (CKP) sensor system consists of a CKP sensor plate and a pickup coil. The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of an iron core and a magnet.
The sensor plate rotates and, as each tooth passes through the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per engine revolution. Based on these signals, the ECM calculates the crankshaft position and engine RPM. Using these calculations, the fuel injection time and ignition timing are controlled.
| DTC No. | DTC Detection Conditions | Trouble Areas |
|---|---|---|
| P0335 |
|
|
| P0339 | Under conditions (a), (b) and (c), no CKP sensor signal to ECM for 0.05 seconds or more (1 trip detection logic)
|
Reference: Inspection using an oscilloscope
HINT:
- The correct waveform is shown above.
- VV1 + and VV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.
| Items | Contents |
|---|---|
| Terminals | VV1+-VV1- VV2+ - VV2- NE+ -NE- |
| Equipment Settings | 5 V/DIV, 20 msec./DIV. |
| Conditions | Cranking or idling |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.