DTC after exhaust manifold installation

smig · 18th June 2012, 13:19

I installed my TDI/XO/AAS exhaust manifold approx 1 week ago, and all went well, but on Friday I got the check system message, plugged it into my Flashpro, and the code was 'P0420 - Catalyst system efficiency below threshold (bank 1)'. Anyway, I cleared the code, and didnt use the car until today, and it came back.

I connected the lambda sensors in when I installed it.

Any ideas what might be causing this?

tdi-north · 18th June 2012, 13:29

Yes. Disable secondary O2 sensor as this checks performance of the cat

Guitaralmond · 18th June 2012, 14:26

Quote:

Originally Posted by tdi-north

Yes. Disable secondary O2 sensor as this checks performance of the cat

Top stuff

Noxia · 18th June 2012, 14:33

How does it sound Smig? Mines going on Wednesday.

Guitaralmond · 18th June 2012, 14:44

Quote:

Originally Posted by Noxia

How does it sound Smig? Mines going on Wednesday.

Prob very raspy!!

Will be interesting to hear the Martelius with the TDI manifold, we have seen it with the CPL and Tegi system so far...

Noxia · 18th June 2012, 14:57

Yeah hope so. Miss the front noise since HKS gone. Hopefully the CAI has a growl too.

Guitaralmond · 18th June 2012, 15:01

Quote:

Originally Posted by Noxia

Yeah hope so. Miss the front noise since HKS gone. Hopefully the CAI has a growl too.

Nope, will be like OEM, you wont hear a thing unfortunately with a Martelius and manifold.

Noxia · 18th June 2012, 15:04

Ah ok. More the air intake noise I miss but hopefully get something

MiChA · 18th June 2012, 16:47

Quote:

Originally Posted by Guitaralmond

Prob very raspy!!

Will be interesting to hear the Martelius with the TDI manifold, we have seen it with the CPL and Tegi system so far...

How is the comparision between CPL/tegi with martelius?

Guitaralmond · 18th June 2012, 16:52

Quote:

Originally Posted by MiChA

How is the comparision between CPL/tegi with martelius?

Both loud!! LOL not sure if anyone has had a listen to both yet. But expect it to be unbelieveable in terms of volume

Noxia · 18th June 2012, 16:56

I thought its no different from OEM?

Guitaralmond · 18th June 2012, 17:06

Quote:

Originally Posted by Noxia

I thought its no different from OEM?

A decat manifold no different to OEM??? LOL

The Tegi manifold doubled the volume of the Martelius at all revs (nearly literally

)

Noxia · 18th June 2012, 17:30

I asked about my TDi manifold and you said I wouldn't hear it. Or did you mean I won't hear manifold because the noise is increased from the exhaust instead?

smig · 18th June 2012, 18:58

Quote:

Originally Posted by Noxia

How does it sound Smig? Mines going on Wednesday.

It is a bit louder than I thought it would be on cold start (but I`ve also got a Milltek fitted), once warm on tickover it sounds factory. Normal driving its nice and throaty without sounding OTT, in VTEC its fecking awesome (in conjunction with the RSK)

. Its got more top end pull now (and its not been tuned yet - saving up for that).

Quote:

Originally Posted by tdi-north

Yes. Disable secondary O2 sensor as this checks performance of the cat

Thanks TDI, thats put my mind at rest

Now to the follow up question you possibly expected. How do I disable the sensor? (BTW, dont know if it makes any odds, but Im not using the group N map, but the standard map (dont really like the group N))

Noxia · 18th June 2012, 19:23

Smig is it running a bit lame without a remap?

smig · 18th June 2012, 19:30

Quote:

Originally Posted by Noxia

Smig is it running a bit lame without a remap?

It runs perfectly as is, but it wont reach its full potential until its been remapped.

smig · 18th June 2012, 19:36

Right then, as i dont want to use the `group n` calibration, am I right in thinking I need to use the `stock equivilant` calibration, then click `closed loop`, then uncheck `secondary oxygen sensor enabled`.

Or is there an better/easier way?

Guitaralmond · 19th June 2012, 10:48

Quote:

Originally Posted by Noxia

I asked about my TDi manifold and you said I wouldn't hear it. Or did you mean I won't hear manifold because the noise is increased from the exhaust instead?

I ment you wouldn't hear the intake lol! The manifold will make the exhaust way louder

Noxia · 19th June 2012, 12:12

Ah got you now lol.

culasse · 19th June 2012, 15:50

I have a TDI/XO/AAS manifold on my car aswell and love it. It makes a raspy sound when on medium throttle but I love it. I still have the stock catback on my car albeit slightly modified.
You can take the second lambdasensor off your car and then switch it off on flashpro. You need a bolt to plug the hole in the manifold.
Smig If you are interested I have several optimised maps for your combination. Email me when you are interested.

Paul.

18th June 2012, 13:19	#1 (permalink)
smig OOOOSH Car: 2007 Type R GT - NHB Join Date: 17th July 2011 Location: Derbyshire Posts: 666 Thanks given: 87 Thanked 91 Times in 79 Posts iTrader: (5)	DTC after exhaust manifold installation I installed my TDI/XO/AAS exhaust manifold approx 1 week ago, and all went well, but on Friday I got the check system message, plugged it into my Flashpro, and the code was 'P0420 - Catalyst system efficiency below threshold (bank 1)'. Anyway, I cleared the code, and didnt use the car until today, and it came back. I connected the lambda sensors in when I installed it. Any ideas what might be causing this?

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18th June 2012, 13:29	#2 (permalink)
tdi-north Commercial user Join Date: 3rd May 2008 Location: Warrington Posts: 3,901 Thanks given: 133 Thanked 606 Times in 466 Posts iTrader: (0)	Yes. Disable secondary O2 sensor as this checks performance of the cat

18th June 2012, 14:33	#4 (permalink)
Noxia (\)o_O(/) Car: 2008 CTR, Silver Join Date: 16th October 2011 Location: Melksham Posts: 3,590 Thanks given: 588 Thanked 505 Times in 434 Posts iTrader: (10)	How does it sound Smig? Mines going on Wednesday.

18th June 2012, 14:57	#6 (permalink)
Noxia (\)o_O(/) Car: 2008 CTR, Silver Join Date: 16th October 2011 Location: Melksham Posts: 3,590 Thanks given: 588 Thanked 505 Times in 434 Posts iTrader: (10)	Yeah hope so. Miss the front noise since HKS gone. Hopefully the CAI has a growl too.

18th June 2012, 15:04	#8 (permalink)
Noxia (\)o_O(/) Car: 2008 CTR, Silver Join Date: 16th October 2011 Location: Melksham Posts: 3,590 Thanks given: 588 Thanked 505 Times in 434 Posts iTrader: (10)	Ah ok. More the air intake noise I miss but hopefully get something

18th June 2012, 16:56	#11 (permalink)
Noxia (\)o_O(/) Car: 2008 CTR, Silver Join Date: 16th October 2011 Location: Melksham Posts: 3,590 Thanks given: 588 Thanked 505 Times in 434 Posts iTrader: (10)	I thought its no different from OEM?

18th June 2012, 17:30	#13 (permalink)
Noxia (\)o_O(/) Car: 2008 CTR, Silver Join Date: 16th October 2011 Location: Melksham Posts: 3,590 Thanks given: 588 Thanked 505 Times in 434 Posts iTrader: (10)	I asked about my TDi manifold and you said I wouldn't hear it. Or did you mean I won't hear manifold because the noise is increased from the exhaust instead?

18th June 2012, 19:23	#15 (permalink)
Noxia (\)o_O(/) Car: 2008 CTR, Silver Join Date: 16th October 2011 Location: Melksham Posts: 3,590 Thanks given: 588 Thanked 505 Times in 434 Posts iTrader: (10)	Smig is it running a bit lame without a remap?

18th June 2012, 19:36	#17 (permalink)
smig OOOOSH Thread starter Car: 2007 Type R GT - NHB Join Date: 17th July 2011 Location: Derbyshire Posts: 666 Thanks given: 87 Thanked 91 Times in 79 Posts iTrader: (5)	Right then, as i dont want to use the `group n` calibration, am I right in thinking I need to use the `stock equivilant` calibration, then click `closed loop`, then uncheck `secondary oxygen sensor enabled`. Or is there an better/easier way?

19th June 2012, 12:12	#19 (permalink)
Noxia (\)o_O(/) Car: 2008 CTR, Silver Join Date: 16th October 2011 Location: Melksham Posts: 3,590 Thanks given: 588 Thanked 505 Times in 434 Posts iTrader: (10)	Ah got you now lol.

19th June 2012, 15:50	#20 (permalink)
culasse Join Date: 2nd March 2009 Location: sappemeer Posts: 639 Thanks given: 2 Thanked 74 Times in 63 Posts iTrader: (0)	I have a TDI/XO/AAS manifold on my car aswell and love it. It makes a raspy sound when on medium throttle but I love it. I still have the stock catback on my car albeit slightly modified. You can take the second lambdasensor off your car and then switch it off on flashpro. You need a bolt to plug the hole in the manifold. Smig If you are interested I have several optimised maps for your combination. Email me when you are interested. Paul.