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P0236Turbocharger/Supercharger Boost Sensor "A" Circuit Range/Performance

What it means

The boost pressure sensor signal is electrically possible, but it doesn't make sense compared with other sensors or with what the engine is doing. The boost pressure sensor measures the pressure after the turbo or supercharger.

Symptoms

  • Limp mode with low power
  • Black smoke or poor acceleration
  • Check engine light

Common causes

  • Sensor contaminated with oil or soot
  • Boost leak or split hose
  • Sensor drifting
  • Real overboost or underboost

What to check first

  1. Key on, engine off: boost pressure should match barometric pressure
  2. Compare requested and actual boost under load
  3. Clean or inspect the sensor and check for boost leaks
Can I drive with P0236? Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

How to test the parts behind P0236

MAP and boost pressure sensorWiring, typical values, multimeter and scope tests

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P0236: questions and answers

What does P0236 mean?

P0236: Turbocharger/Supercharger Boost Sensor "A" Circuit Range/Performance. The boost pressure sensor signal is electrically possible, but it doesn't make sense compared with other sensors or with what the engine is doing. The boost pressure sensor measures the pressure after the turbo or supercharger.

What are the symptoms of P0236?

Limp mode with low power. Black smoke or poor acceleration. Check engine light.

What causes P0236?

Sensor contaminated with oil or soot. Boost leak or split hose. Sensor drifting. Real overboost or underboost.

How do you diagnose P0236?

1. Key on, engine off: boost pressure should match barometric pressure 2. Compare requested and actual boost under load 3. Clean or inspect the sensor and check for boost leaks

Can I drive with P0236?

Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.