Difference between revisions of "P0491"

Revision as of 09:39, 3 March 2021

Fuse or relay for Secondary Air Injection Pump faulty
Hose(s)/Piping between Secondary Air Injection Pump and Combi (Secondary Air Injection) Valve leaking
Secondary Air Injection Solenoid(s) faulty
Secondary Air Injection Pressure Sensor faulty
Combi Valve(s) faulty
Secondary Air Injection ports in the cylinder head(s) plugged with carbon See Special Notes

Check fuse and relay for Secondary Air Injection Pump system.
Check hose(s)/Piping between Secondary Air Injection Pump and Combi Valve
Check Secondary Air Injection Solenoid(s)
Check Secondary Air Injection Pressure Sensor
Check Combi Valve(s)
Clean Secondary Air Injection ports in the cylinder head(s) if obstructed with carbon See Special Notes

@@ Line 28: / Line 28: @@
 ==== Special Notes ====
-* When found in the following '''NAR''' (North American Market) Audi models listed below check to see if TPI 2033001 is applicable:
+* When found in most '''NAR''' (North American Market) 2009 to 2016 Audi models with 3.0L or 3.2L engines with [[P0491]] and [[P0492]] stored at same time, check to see if TPI '''2033001''' is applicable.
+** https://static.nhtsa.gov/odi/tsbs/2018/MC-10153120-9999.pdf  NHTSA
-*'''Audi''' TPI  2033001 pertains to [[P0491]] and [[P0492]] stored at same time on the following vehicles with more than 15,000 miles:
+*** 2010+ S4 and S5 with CCBA 3.0L
-** 2010+ S4 and S5 with CCBA 3.0L
+*** 2008+ A5, 2009+ A4, 2011 A6 with CALA 3.2L
-** 2008+ A5, 2009+ A4, 2011 A6 with CALA 3.2L
+*** 2009-2011 A6 CCAA 3.0L
-** 2009-2011 A6 CCAA 3.0L
+*** 2012 A6/A7 CGXB 3.0L
-** 2012 A6/A7 CGXB 3.0L
+*** 2013+A6/A7 CTUA 3.0L
-** 2013+A6/A7 CTUA 3.0L
+*** 2009+ Q5 CALB 3.2L
-** 2009+ Q5 CALB 3.2L
+*** 2011+ Q7 CJWE, CJWC, CJWB 3.0L
-** 2011+ Q7 CJWE, CJWC, CJWB 3.0L
 [[Category:Fault Codes]]