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Engine/Power - EJ20T (pre-2006 WRX and JDM)
Use of turboxs Dwn Pipe, throw code

Engine/Power - EJ20T (pre-2006 WRX and JDM) There is replacement for displacement, it is forced induction - OEM 2.0 liter turbo engines in the USDM WRX. 90-94 Legacy Turbo EJ22 turbo engines can also be discussed here.

Use of turboxs Dwn Pipe, throw code

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Old

Nov 13, 2003 | 07:45 AM

#1

kevster

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Posts: n/a

Question

Use of turboxs Dwn Pipe, throw code

I am too install a Turboxs down pipe this pipe eliminates just the one cat from the turbo and still leaves the other cat by the o2 sensor, will this still throw a check engine code?? or not?

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Old

Nov 13, 2003 | 08:13 AM

#2

Mulder

VIP Member

Joined: Nov 2002

Posts: 1,646

From: NYC

Car Info: 02 WRX WRB

Yes a catless downpipe will result in a P0420 catalyst inefficiency CEL. The third cat is downstream of the rear 02 sensor and isn't monitored by the ECU.

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Old

Nov 14, 2003 | 12:08 AM

#3

international B

Chewwwwy

iTrader: (5)

Joined: Nov 2002

Posts: 3,399

From: Fremont

Car Info: Random, yet well planed selection of jdm cult cars

this code can be easily fixed using a mil eliminator. i wouldnt worry about it too much.

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Old

Nov 14, 2003 | 12:20 AM

#4

Max Xevious

BanHammer™

iTrader: (8)

Joined: May 2000

Posts: 47,596

From: Wagonmafia Propaganda Lieutenant

Car Info: 2014 Forester XT

hmm.. my turboxs TBE has the cat before the rear O2 and is fine.

are you using a cat eliminator pipe ?

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