1. DTC P0101 description
The MAF sensor is an air flow meter that measures the amount of air that enters the engine. It is installed between the air cleaner and the turbocharger. When the amount of air entering the engine is small, it indicates deceleration or idling speed. When the amount of air entering the engine is large, it indicates acceleration or a high load state. The ECM calculates a predicted MAF value and compares the actual MAF sensor voltage signal to the predicted MAF value. This comparison determines if the signal is stuck, or is too low or too high for a particular operating condition. If the ECM detects that the actual MAF sensor signal voltage is not within the predetermined range of the calculated MAF predicted value, the DTC is set.
2. Condition for setting DTC P0101
Condition for running the DTC
- DTCs P0047, P0102, P0103, P0112, P0113, P0116, P0117, P0118, P0122, P0123, P0234, P0237, P0238, P02E3, P042E, P042F, P060B, P0638, P0651, P1655, P2227, P2228, P2229, and U0001 are not set.
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0047 (Flash Code 249) Turbocharger Boost Control Solenoid Circuit".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0102 (Flash Code 91) Mass Air Flow Circuit Low Input".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0103 (Flash Code 91) Mass Air Flow Circuit High Input".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0112 (Flash Code 22) Intake Air Temperature Sensor Circuit Low".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0113 (Flash Code 22) Intake Air Temperature Sensor Circuit High".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0116 (Flash Code 23) Engine Coolant Temperature Sensor Circuit Range/Performance".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0117 (Flash Code 23) Engine Coolant Temperature Sensor Circuit Low".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0118 (Flash Code 23) Engine Coolant Temperature Sensor Circuit High".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0122 (Flash Code 43) Throttle Position Sensor Circuit Low".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0123 (Flash Code 43) Throttle Position Sensor Circuit High".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0234 (Flash Code 42) Turbocharger Overboost Condition".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0237 (Flash Code 32) Turbocharger Boost Sensor Circuit Low".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0238 (Flash Code 32) Turbocharger Boost Sensor Circuit High".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P02E3 (Flash Code 43) Intake Air Flow (IAF) Valve Control Circuit High Voltage".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P042E (Flash Code 45) Exhaust Gas Recirculation (EGR) Closed Position Performance".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P042F (Flash Code 45) Exhaust Gas Recirculation (EGR) Open Position Performance".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P060B (Flash Code 36) Internal Control Module A/D Processing Performance".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0638 (Flash Code 61) Throttle Actuator Control Range/Performance".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0651 (Flash Code 56) Sensor Reference Voltage 2 Circuit".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P1655 (Flash Code 59) Sensor Reference Voltage 4 Circuit".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P2227 (Flash Code 71) Barometric Pressure Circuit Range/Performance".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P2228 (Flash Code 71) Barometric Pressure Circuit Low".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P2229 (Flash Code 71) Barometric Pressure Circuit High".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC U0001 (Flash Code 84) High Speed CAN Communication Bus".
Also, the following are met for 2.9 seconds or more:
- The EGR control is commanded OFF.
- The battery voltage is 9 to 16 V.
- The accelerator pedal is not depressed.
- The engine is running.
- The fuel injection control is commanded OFF.
- The air intake throttle control is commanded OFF.
Condition for setting the DTC
- The ECM detects that the difference between the actual MAF value and the predicted MAF value is not within the predetermined range for 7.9 seconds or more.
3. Action taken when DTC P0101 sets
- Euro4: The ECM illuminates the MIL. Refer to Action taken when DTC sets - Type B (Euro4).
- Except Euro4: The ECM illuminates the check engine warning light. Refer to Action taken when DTC sets - Type B (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC type definitions".
4. Condition for clearing DTC P0101
- Euro4: Refer to Condition for clearing the MIL/DTC - Type A or Type B (Euro4).
- Except Euro4: Refer to Condition for clearing the check engine warning light/DTC - Type A or Type B (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC type definitions".