DTC | P1522 | Sensor Supply Voltage 1 Below Lower Limit |
P1523 | Sensor Supply Voltage 1 Above Upper Limit |
The 5 V power source in the ECM is supplied to the Mass Air Flow Sensor (MAFS), Acceleration Position Sensor 1(APS1). The ECM monitors this sensor supply voltage.
DTC No | Detecting Condition & Limp Home | Suspected area |
P1522 P1523 | Detecting Condition P1522: Sensor supply voltage ＜ 4.7V P1523: Sensor supply voltage ＞ 5.2V Enable Condition Ignition switch : ON Limp Home Engine speed is fixed at 1200 rpm | - Open or short in sensor supply circuit - ECM |
Proceed with ECM problem procedure. |
