P0102 Hyundai Tucson
MAF Sensor Circuit Low Input · Powertrain Code · Medium · Repair: Easy
What is P0102?
The MAF sensor is reading below its expected range. Could indicate a dirty sensor, air leak, or wiring issue.
When the Hyundai Tucson triggers code P0102 (maf sensor circuit low input), it typically points to an issue in the powertrain system. Below you'll find the most common causes, symptoms, and repair options specific to the Hyundai Tucson.
This repair is rated easy, meaning basic tools, no lift needed.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Hyundai Tucson.
Common Causes on Hyundai Tucson
- Failed MAF sensor producing low voltage output
- Disconnected or damaged MAF sensor wiring harness
- Large vacuum or intake air leak downstream of MAF
- Corroded MAF sensor connector pins
Symptoms
- Check Engine Light on
- Engine runs rich at idle
- Poor acceleration
- Stalling when coming to a stop
- Hard starting
Notes for Hyundai Tucson
Always check the air filter housing clips are fully latched; a loose housing causes false low readings.