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2019 VOLKSWAGEN GOLF R
2.0L Turbo I4•AWD•AUTOMATIC•gas•CJXC•turbo
7 active safety recalls on this vehicle — view recalls
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Repairs0Labor497Torque3153Fluid7DTC1145Battery1Maintenance0Recalls7
16515moderate severityPowertrain

O2 Sensor Circuit Low Voltage Bank 1 Sensor 1

on 2019 Volkswagen Golf R 2.0L Turbo I4 · AWD

What this code means

The upstream oxygen sensor signal voltage is too low on Bank 1 Sensor 1 (OBD P0131). This indicates a lean signal or circuit fault.

Symptoms

  • Poor fuel economy
  • Hesitation
  • Check engine light on

Common causes

  • Faulty oxygen sensor
  • Short to ground in wiring
  • Exhaust leak
  • Lean fuel mixture

Diagnostic steps

  1. Read live O2 sensor voltage
  2. Inspect wiring for short to ground
  3. Check for exhaust and intake leaks
  4. Test sensor response
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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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