P0238 - Turbocharger/Supercharger Boost Sensor 'A' Circuit High
- Boost pressure sensor circuit poor electrical connection
- Faulty boost pressure sensor
- Faulty Turbo/Super Charger
- Engine over temperature
- Ignition misfire exceeds the calibrated threshold
- Faulty Knock sensor (KS)
The boost pressure sensor responds to pressure changes in the intake manifold. This pressure is created by the turbocharger and changes with accelerator pedal position (APP) and engine speed. The engine control module (ECM) uses this information to assist in diagnosis of the barometric pressure (BARO) sensor and to provide engine overboost protection. The boost pressure sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The engine control module (ECM) supplies 5 volts to the boost pressure sensor on the 5-volt reference 2 circuit, and provides a ground on a low reference circuit. The boost pressure sensor provides a signal to the ECM on a signal circuit relative to the pressure changes. The ECM monitors the boost pressure sensor signal for voltage outside of the normal range. The ECM calculates a predicted value for the boost pressure sensor. The ECM then compares the predicted value to the actual signal.
P0238 ISUZU Turbocharger Boost Sensor Circuit High Voltage
P0238 MERCEDES-BENZ Turbocharger/Supercharger Boost Sensor 'A' Circuit High
P0238 VOLKSWAGEN Turbo/Super Charger Boost Sensor 'A' Circuit High
how do i fix the problem its on a 04 citroen 1.4 hdi 77.000 miles on the clock ...
could the egr cooler cause this high boost pressure?...
turbo has been replaced and the turbo pressure sensor but the fault persists error codes p0238 and ...
Will a p0238 code cause loss of power...
Any information is appreciated. Thanks