The fault code P2228 is detailed as follows:
System Scope: Fuel, Air or Emissions Control
Applicable models: All car manufacturers
Chinese meaning explanation: Atmospheric pressure circuit voltage is low
P2228 fault code related knowledge:
1. The position and function of the atmospheric pressure sensor on the vehicle: A). Generally integrated in the ECU. B). It is used to detect the atmospheric pressure and determine the altitude, and to control the correction of the fuel injection parameters. Barometric pressure (BARO) sensors respond to changes in altitude and atmospheric conditions. This provides an indication of barometric pressure to the Engine Control Module (ECM). The engine control module uses this information to calculate fuel delivery.
2. The type and structure principle and influence of atmospheric pressure sensor: The sensor is a Painstone bridge diffused on a single crystal silicon wafer, and the voltage resistance effect is that the resistance value of the bridge wall changes, resulting in a differential voltage signal. This signal is converted into a standard 4 ~ 20mA/1 ~ 5VDC through a special amplifier, and then through voltage and current conversion.
Analysis of the meaning of the fault: 1. Explanation of the fault code The function of the atmospheric pressure sensor is to convert the atmospheric pressure into a voltage signal and input it to the ECU, which is used to calculate and correct the basic fuel injection duration. This fault code will appear if the electronic control unit (ECU) detects that the barometric pressure sensor signal voltage is outside the calibrated normal range.
Fault causes and solutions:
1. Cause of failure
A). Whether the atmospheric pressure sensor and its circuit have short circuit, open circuit and poor contact;
B). Whether the ECU is faulty.
2 Processing methods
A). If this fault code appears, please contact a professional technician.
