DTC P0236: Turbocharger Boost Sensor Circuit Range/Performance Problem: General Description

This turbocharged engine is equipped with three absolute pressure sensors.

Normal operating conditions:

1. The barometric pressure (BARO) sensor value and the turbocharger boost sensor value are the same when there is no boost.
2. The turbocharger boost sensor value and the manifold absolute pressure (MAP) sensor value are similar at high throttle openings (boost).

When two of the compared sensor values above differ by a specified value or more, a sensor abnormality is detected.

• (A) No boost condition: Either the BARO sensor or the turbocharger boost sensor is abnormal. (P1233)
• (B) Large throttle opening area (boost): Either the turbocharger boost sensor or the MAP sensor is abnormal. (P1234)
• When abnormal values are detected at both areas (A) and (B), turbocharger boost sensor abnormality is identified. (P0236)
• When the turbocharger boost sensor or the MAP sensor does not change a specified value or more, even when transitioning from (A) to (B) or from (B) to (A), a stuck sensor output value is detected (turbocharger boost sensor: P0236, MAP Sensor P1129).