What does code P1102 mean on Volkswagen vehicles?
The ECU detects low voltage in the oxygen sensor heater circuit for bank 1 sensor 1, possibly influenced by intake or exhaust air leaks.
OBD-II Code Volkswagen
P1102 — Volkswagen — Oxygen Sensor Heater Circuit Bank 1 Sensor 1 Voltage Too Low / Air Leak
The ECU detects low voltage in the oxygen sensor heater circuit for bank 1 sensor 1, possibly influenced by intake or exhaust air leaks.
Common symptoms
- Check engine light
- increased fuel consumption
- rough idle
Possible causes
- Intake or exhaust air leak
- faulty O2 sensor heater
- damaged wiring
Initial recommendation
Check for air leaks, inspect wiring, and test or replace the O2 sensor.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
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