P0396

Universal

Camshaft Position Sensor B Circuit Intermittent (Bank 2)

Definition source: General OBD-II reference catalog
Definition verification: Not independently verified for display.
Time: Varies by diagnosis and vehicle | Diagnostic difficulty: Medium
Medium Severity

The engine computer has detected an intermittent signal in the circuit for camshaft position sensor B on bank 2. The sensor reports camshaft position so the computer can coordinate engine timing and operation. A signal that cuts in and out may affect engine performance or starting, but this code does not by itself prove that the sensor needs replacement. Exact applicability and diagnostic procedures depend on the vehicle's model, year and engine.

Report an error with this code

⚠️ Before You Begin (Safety First)

If the engine stalls, runs very roughly, loses power, or becomes difficult to control, stop somewhere safe and arrange diagnosis rather than continuing to drive. If the warning light is on but the vehicle runs normally, limit unnecessary driving and have the fault checked soon.

Common Symptoms

  • There may be no noticeable symptoms if the signal interruption is brief or intermittent.
  • The engine may crank longer or start inconsistently if the computer temporarily loses camshaft position information.
  • Rough running, hesitation or reduced performance may occur if engine timing control is affected.
  • The engine warning light may turn on when the computer detects the intermittent circuit condition.
  • The engine may stall if the signal loss is severe enough to disrupt engine operation.

Common Causes

  • An intermittent fault inside camshaft position sensor B on bank 2.
  • A loose, damaged or contaminated electrical connector at the sensor or elsewhere in its circuit.
  • Wiring that is damaged, chafed, corroded or making intermittent contact.
  • A problem with the sensor circuit's power, ground or signal path.
  • A mechanical camshaft or timing-related condition affecting the signal, which requires vehicle-specific diagnosis.

Diagnostic Steps

  1. Note whether the engine starts, idles and drives normally, and whether the warning light is steady or flashing. Stop driving if the engine stalls or runs severely poorly.
  2. Use a compatible scan tool to confirm P0396 and record any related codes before clearing anything. Related codes can help distinguish a single circuit issue from a broader timing or signal problem.
  3. With the engine off and cool, visually inspect accessible wiring and connectors for looseness, corrosion, damaged insulation or signs of rubbing. Do not pull on wires or disconnect components while the engine is running.
  4. Check the vehicle's owner information and service data to identify bank 2 and sensor B for the specific engine. Do not assume their locations are the same across vehicles.
  5. If the code returns or the wiring inspection does not reveal an obvious issue, have the circuit and camshaft signal tested using vehicle-specific procedures before replacing parts.

When to Call a Professional

Confirm the code and check for related camshaft, crankshaft or timing codes. A technician can compare scan data with the vehicle's expected camshaft signal, inspect the sensor circuit and connectors, and use suitable electrical test equipment to look for an intermittent signal or wiring fault. Check vehicle-specific service information before testing or replacing parts.

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Commonly Asked Questions

Does P0396 mean camshaft position sensor B on bank 2 has failed?

No. The code identifies an intermittent circuit signal, not a confirmed failed sensor. Wiring, connectors and other signal-related or timing-related conditions should also be considered.

What does intermittent mean in this code?

The computer detected a signal that was not consistently available or reliable. A fault that comes and goes can be harder to find than a continuously present failure.

Can I keep driving with P0396?

If the vehicle runs normally, arrange diagnosis soon and avoid unnecessary trips. If it stalls, runs very roughly, loses power or becomes difficult to control, stop safely and seek assistance.

How can I tell which sensor and bank the code refers to?

Sensor and bank locations depend on the engine. Use vehicle-specific service information rather than relying on a generic location description.

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.