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.
The ECM monitors the signal voltages of the booster pressure sensor and if its voltages are too low, this DTC P0237 is set up.
Item
Detecting Condition
Possible Cause
DTC Strategy
Electrical Check
Short to ground in signal harness
Poor connection or damaged harness
Faulty PUT
Enable Conditions
10V < Battery voltage <16V
Threshold Value
PUT voltage < 0.92 V
Diagnostic Time
1 sec
MIL On Condition
2 Driving cycles
Pressure (kPa)
Voltage (V)
25.4
0.5
50
0.95
220
4.1
241.9
4.5