General Information

Engine Control
P0238 Turbocharger/Supercharger Boost Sensor \'A\' Circuit High - General Information

Component Location





General Description

It has a function where it measures air that is flown into the intake manifold and serves this signal to the ECM. The inputted signal is computes the intake air amount, which is further used to determine the ignition timing and suitable amount of fuel to the relevant load. The MAP sensor is divided into the sensor installed the intake manifold and the sensor installed in between the intercooler and throttle body. The reason for using 2 sensors is to determine the ignition timing and suitable amount of fuel when the change of negative pressure for the intake manifold at the time where there is sudden increase or decrease in speed in after and before the throttle body.

DTC Description

This code means electrical fault of 2nd T-MAP(PUT :pressure upstream throttle). ECU shows P0237 under the condition of short circuit battery.

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram





Signal Waveform & Data








Fig 1) ENGINE STOP : 2nd T-MAP and T-MAP are under the atmosphere pressure condition
Fig 2) ENGINE RUN Turbo booster condition : Barometric pressure sensor displays atmosphere pressure, and 2nd T-MAP & T-MAP show similar value by throttle open