P0236 Code - Turbocharger/Supercharger Boost Sensor 'A' Circuit Range/Performance

What Does P0236 Mean?

OBD-II Code P0236 is defined as a Turbocharger/Supercharger Boost Sensor "A" Circuit

The Boost Pressure Sensor tells the engine control module (PCM) how much boost is actually being created by the turbocharger. When PCM detects an incorrect signal from the Boost Pressure Sensor, the PCM will set code P0236.

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What are the common causes of P0236 ?

The most common causes of this code include a vacuum leak at the intake manifold, a dirty air cleaner, the wastegate is either stuck open or closed, a defective intercooler, loose bolts between the exhaust manifold and the turbocharger, a loose flange between the turbocharger and the intake pipe, a faulty boost sensor, shorted or open wiring in the boost sensor circuit, loose, corroded, or disconnected electrical connectors in the boost sensor 5-volt reference circuit, or turbo failure. Turbo failure is usually caused by internal oil leaks and oil supply restrictions. These leaks/obstructions contribute to an insufficient oil supply to the turbocharger main shaft; resulting in a cracked turbo housing, turbo bearing failure, bearing wobble (causing the impeller to contact the housing), and damaged or missing impeller blades.

How do you troubleshoot P0236 ?

• Replacing the boost sensor if it is not giving the correct input pressure reading to the ECM
• Repairing or replacing hoses and connections to the turbo boost sensor that have kinks or blockage of the lines

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