P0102 Subaru Crosstrek
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 Subaru Crosstrek 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 Subaru Crosstrek.
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 Subaru Crosstrek.
Common Causes on Subaru Crosstrek
- Failed MAF sensor producing low voltage
- Disconnected or damaged MAF sensor wiring
- Large air leak downstream of the MAF sensor
- Corroded MAF sensor connector pins
Symptoms
- Check Engine Light on
- Engine runs rich
- Poor acceleration
- Stalling when stopping
- Hard starting
Notes for Subaru Crosstrek
Verify the air filter housing is fully sealed; Subaru housings can pop loose and cause MAF reading errors.