DTC P0139 Audi

Description

rich voltage, > =547.9 mV lean voltage < =201.2 mV OR Max O2 mass flow (disable), > =5000 mg O2S rear, ready fuel cut-off, ready front O2 sensor, lambda signal, >2.00 modeled exhaust gas temp. >400° C exhaust gas mass flow, >25.0 kg h rear O2 sensor internal resistance, < =700Ω or resistance measurement, ready front O2 sensor, sensor cross change, no fault rear O2 sensor heater, wires and oscillating check, no fault purge valve, no fault trigger for step change, delta transient time, >0