P1154 Audi HO2S Transition Time Ratio Bank 2 Sensor 1
Possible causes
– Faulty Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
– Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 harness is open or shorted
– Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 circuit poor electrical connection
– Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 harness is open or shorted
– Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 circuit poor electrical connection
What about the obd code?
The P1154 Audi code sets if the HO2S ratio is not within range.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1154 Audi Description
The Powertrain Control Module (PCM) continuously monitors the Heated Oxygen Sensor (HO2S) activity for 100 seconds. During the monitor period the PCM counts the number of times that the HO2S responds from rich to lean and from lean to rich and adds the amount of time it took to complete all transitions. With this information, an average time for all transitions can be determined. The PCM then divides the rich to lean average by the lean to rich average to obtain a ratio.
Audi Vehicle:Audi A1,Audi A3,Audi A1,Audi A3,Audi A1,Audi A3,Audi A4,Audi A5,Audi Q3,Audi A5,Audi Q5,Audi A3,Audi A4,Audi A5,Audi TT,Audi Q3,Audi Q5,Audi S3,Audi TTS,Audi RS 3,Audi TT RS,Audi A7,Audi Q7,Audi A8,Audi A6,Audi S4,Audi S5,Audi Q5,Audi S6,Audi S8,Audi S5,Audi A8,Audi R8 V8,Audi RS 5,Audi S6,Audi R8 V10,Audi R8 GT,Audi A8L