P0336
UniversalCrankshaft Position Sensor A Circuit Range/Performance
The crankshaft position sensor provides the engine computer with information about crankshaft position and rotation. P0336 means the computer detected a Sensor A signal that did not behave as expected. The code identifies a signal problem, not proof that the sensor itself has failed. Depending on the vehicle and fault, engine operation or starting may be affected.
⚠️ Before You Begin (Safety First)
If the engine stalls, becomes difficult to control, or repeatedly loses power, pull over safely and arrange assistance rather than continuing to drive. A stall can create a hazard, especially in traffic. If the vehicle runs normally, have the issue checked promptly and watch for worsening symptoms.
Common Symptoms
- The check-engine light may be on, with no noticeable change in how the vehicle runs.
- The engine may crank longer than usual or fail to start if the computer cannot obtain a usable crankshaft signal.
- The engine may stall or run unevenly if the signal becomes erratic while running.
- Engine power or acceleration may be inconsistent if the computer cannot reliably use the crankshaft signal.
Common Causes
- A crankshaft position Sensor A signal that is inaccurate, intermittent, or outside the expected range.
- Damaged, loose, corroded, or poorly connected wiring or connectors in the sensor circuit.
- A problem with the rotating signal target or related mechanical condition that affects the sensor reading.
- Incorrect sensor installation or another vehicle-specific issue affecting the signal.
Diagnostic Steps
- Note whether the engine starts, stalls, or runs differently, and whether the warning light is steady or flashing; this helps describe the fault for diagnosis.
- With the engine off and cool, visually check accessible sensor-circuit wiring and connectors for looseness, damage, corrosion, or contact with hot or moving parts.
- If you have a scan tool, record the stored codes and available freeze-frame information before clearing anything; related data can help reproduce and diagnose an intermittent signal fault.
- Avoid replacing the sensor based on the code alone. If visual checks do not identify an obvious issue, ask a qualified technician to test the circuit and signal using procedures for the exact vehicle.
When to Call a Professional
A technician can review scan data, check whether crankshaft speed and position signals are plausible, inspect the sensor circuit and connectors, and use an oscilloscope to assess the signal when needed. The sensor, wiring, mechanical signal target, and vehicle-specific installation details should be checked before deciding what to replace.
Compare component listings
Confirm diagnosis and vehicle fitment before buying. A listing does not prove that a part needs replacement. We may earn a commission from qualifying purchases.
Commonly Asked Questions
Does P0336 prove the crankshaft position sensor is bad?
No. It indicates that the Sensor A circuit signal did not meet the computer's expected range or performance. Wiring, connectors, the signal target, installation, or other vehicle-specific issues can also cause it.
Can I drive with P0336?
It depends on how the vehicle behaves. If it stalls, loses power, or becomes difficult to control, stop in a safe place and arrange assistance. If it seems to run normally, arrange diagnosis promptly because symptoms may change.
Why might the vehicle have this code but no symptoms?
The signal problem may be intermittent or may not noticeably affect engine operation at the time. A stored code and its related scan data can still help identify the issue.
What checks help distinguish a sensor problem from a wiring problem?
A visual inspection is a starting point, but a technician may also check circuit continuity and connections, review scan data, and assess the sensor waveform. The correct tests depend on the vehicle.
Related Diagnostic Video
Browse Available Code Guides
Previous and next available guides in database record order, across makes. Adjacent entries may share a code number and do not necessarily describe related faults.