Fuel and Air ratios, control module
WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
| DTC | Error Message | Diagnostic Procedure | Malfunction Criteria and Threshold Value | Secondary Parameters with Enable Conditions | Monitoring Time Length | Frequency of checks, MIL Illum |
|---|---|---|---|---|---|---|
| P1176 | Bank 1, Lambda correction downstream of catalyst control limit reached |
|
System too LEAN/RICH delta lambda signal->2% | Lamda controller- CLOSED loop Rear O2 sensor heater and electrical check-No DTC Catalyst temperature-> 470°C Engine speed-1,500 4,000 Rpm Engine load-24 65% | 100 Sec | 2 DCY |