PDA

View Full Version : Question 16806-Main Catalyst; Bank 1: Efficiency Below Threshold


mattdmason
28-09-2009, 05:12 PM
Ive got a 97 passat b4 and i just recently ran my dtc's and this came up.. i just had a new exhaust put on from the cat back, when the garage did it, they said the cat was fine... whats this reading im getting and what can i do to aleviate it??
mattdmason
28-09-2009, 05:16 PM
ive actually got a couple other codes i have repeatedly coming up also and im not sure what they are and what i can do to correct the problems..

16824 - EVAP Emissions Control Sys: Malfunction
16795 - Secondary Air Injection System: Incorrect flow detected
macquatic
28-09-2009, 06:16 PM
Ive got a 97 passat b4 and i just recently ran my dtc's and this came up.. i just had a new exhaust put on from the cat back, when the garage did it, they said the cat was fine... whats this reading im getting and what can i do to aleviate it??

16806
Possible Causes
Oxygen Sensor(s) defective
Oxygen Sensor(s) Control defective
Possible Solutions
Check Oxygen Sensor(s)
Check Oxygen Sensor(s) Control
Perform Oxygen Sensor(s) Aging Check
Set Readiness
Special Notes
For 1.8T's experiencing a similar fault code, this thread may be useful: http://forums.vwvortex.com/zerothread?id=663057
macquatic
28-09-2009, 06:20 PM
16824
Possible Symptoms
Malfunction Indicator Light (MIL) active
Possible Causes
Evaporative Emission (EVAP) System leaking
Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) faulty
Evaporative Emission (EVAP) Canister Purge Solenoid Valve (N115) faulty
Possible Solutions
Check Evaporative Emission (EVAP) System Sealing
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80)
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve (N115)
macquatic
28-09-2009, 06:21 PM
16795
Possible Symptoms
Malfunction Indicator Light (MIL) ON
Possible Causes
Fuel Pump Relay (J17) faulty
Hoses/Pipes to/between Components faulty/clogged
Secondary Air Injection Pump (V101) faulty
Secondary Air Injection Pump Relay (J299) faulty
Secondary Air Injection Solenoid Valve (N112) faulty
Possible Solutions
Check Fuel Pump Relay (J17)
Check Hoses/Pipes to/between Components
Check Secondary Air Injection Hoses/Pipes for Carbonization
Check Secondary Air Injection Pump (V101)
Check Secondary Air Injection Pump Relay (J299)
Check Secondary Air Injection Solenoid Valve (N112)
mattdmason
28-09-2009, 06:24 PM
can these problems be intertwined?
mattdmason
28-09-2009, 06:26 PM
and how do I, or what do i do to check the 02 sensor control aging check?
martin1810
28-09-2009, 06:30 PM
What engine are you talking about? They all sound like a badly fitted exhaust to me.
mattdmason
28-09-2009, 06:55 PM
its a 97 2.8l v6
wham58
30-09-2009, 12:58 AM
Macquatic- That's really nice how you pulled all that information for those codes. It looks like it comes from a database. Can that information be found online?

Thanks,

Bill
martin1810
30-09-2009, 12:03 PM
Search web. ross-tech wiki
macquatic
30-09-2009, 06:00 PM
Macquatic- That's really nice how you pulled all that information for those codes. It looks like it comes from a database. Can that information be found online?

Thanks,

Bill

Hi Bill,
All the info is in my head!


Only kidding. LOL. It's from the Ross-Tech Wiki (which I usually credit in my posts)

Clicky HERE (http://wiki.ross-tech.com/index.php/Category:Fault_Codes)

Very useful info although it doesn't give all codes. ;)Mac