Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSNISSAN-DATSUN2012SENTRA SE-RREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM - DTCS U0101 TO P0159 (QR25DE)DTC P0102, P0103: MAF SENSORON BOARD DIAGNOSIS LOGICNOTES
2012 Nissan-Datsun Sentra SE-R
On Board Diagnosis Logic: Notes
2012 Nissan-Datsun Sentra SE-RSECTION Notes
These self-diagnoses have the one trip detection logic .
| DTC No. | Trouble diagnosis name | DTC detecting condition | Possible cause |
|---|---|---|---|
| P0102 0102 |
Mass air flow sensor circuit low input | An excessively low voltage from the sensor is sent to ECM. |
|
| P0103 0103 |
Mass air flow sensor circuit high input | An excessively high voltage from the sensor is sent to ECM. |
|
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.