Fixed trouble codes: P0236 and P0237: Turbo/Super Charger Boost Sensor "A" Circuit Range/Performance and Turbo/Super Charger Boost Sensor "A" circuit Low; car even cleared it's own codes after driving for 2 days. Super easy to replace, no tools required, even. This is the sensor (on a 2000) on the intake hose leading from your intercooler to the throttle body. It's right on top, near the front right side of the engine.