P0105: MAP or BARO Sensor Voltage Supply
Complete diagnostic information, symptoms, and potential causes
Manufacturer-Specific Variations
This code (P0105) may have different meanings or additional parameters depending on your vehicle's make, model, and year. Always verify with your vehicle's service manual or a qualified technician before attempting repairs.
MAP or BARO Sensor Voltage Supply
Description
Manifold Absolute Pressure (MAP) (G71) or Barometric Pressure (BARO) (F96), Voltage supply
Common Symptoms
- Check Engine Light
- Poor engine performance, especially at altitude
- Rough idle or engine stalling
- Altitude compensation system inoperative
- Possible boost pressure measurement issues (turbo/supercharged engines)
Possible Causes
- Failed MAP or BARO sensor
- Open or short in sensor power circuit
- Blown sensor fuse
- Corroded electrical connectors
- ECU power supply issues to pressure sensors
Diagnosis Steps
- Check MAP/BARO sensor power supply voltage
- Test sensor ground circuit
- Inspect sensor fuse and related circuits
- Check wiring harness for damage or corrosion
- Test ECU power output to pressure sensors
Repair Solutions
- Replace faulty MAP or BARO sensor
- Repair open or shorted power wiring
- Replace blown sensor fuse
- Clean or replace corroded connectors
- Repair ECU power supply circuit if needed
Prevention Tips
- Regular pressure sensor inspections
- Protect electrical connectors from moisture
- Address electrical issues promptly
Working with ECU firmware? Remove DTCs directly from firmware files
Our free Firmware DTC Remover detects and removes hardcoded fault codes directly from ECU firmware files — no software needed. Supports BMW / MINI, VAG (VW, Audi, Porsche, Skoda, Seat, Cupra), PSA (Peugeot, Citroën, DS), Mercedes-Benz, Renault / Dacia / Samsung, Ford (EDC16, EDC17, MD1, MEVD17, MSV/MSD (7X/8X/9X), MS45, DCM3.7, DCM6.x, PCR2.1, DCM3.4, SID201, SID208, SID803/803A, SID3xx (307, 310), SID3xx (301, 305, 307, 309, 310), SID202-SID206, SID209-SID211). Free: 3 removals/day.