Code P1131

tweety_5150 · January 26th, 2011, 09:52 PM

So this weekend I have my sub frame connectors welded in while they did that they changed the o2 sensor it developed a exhaust leak so I had the exhaust flanged gasket changed so I dont hear a leak anymore but im getting the code p1131 any ideas what it could be by the way the car runs good so im not sure if its the o2 sensor

PhxMustang · January 26th, 2011, 10:37 PM

When I got the same code my issue was a vacuum leak. Be odd that you would develop a leak right after sub frame connectors were installed seeing how there under the car. But it’s easy to check for.

cliffyk · January 26th, 2011, 10:49 PM

P1131 (bank 1, front sensor) has the same possible causes as P1130, click here for more.

I would get under there and check the wiring--there is of course a possibility that when they replaced the gasket the O2 sensor connector or wires got tugged on and damaged...

tweety_5150 · January 26th, 2011, 10:55 PM

Originally Posted by PhxMustang

When I got the same code my issue was a vacuum leak. Be odd that you would develop a leak right after sub frame connectors were installed seeing how there under the car. But it’s easy to check for.

where was your leak well im thinking it was more of them having to drop the mid pipe to put the o2 sensor i dont think its the o2 sensor since its driving pretty good.

Aquarius · January 26th, 2011, 11:22 PM

Just because the car is driving well doesn't rule out the O2 sensor. I chased DTCs (P1131 and P1151 amongst others) for almost a year and my was driving great. Turns out pieces of my cats broke off, clogged up my Flowmasters and the exhaust gas was condensing inside the pipe - my O2 sensors were shorting out.

What's your exhaust set-up? Cats or no cats? If it's a front sensor, try switching it from the left side to the right side and seeing if the code follows the sensor.

tweety_5150 · January 27th, 2011, 12:28 AM

Its stock other than some super 44 mufflers.

PhxMustang · January 27th, 2011, 05:21 PM

Originally Posted by tweety_5150

where was your leak well im thinking it was more of them having to drop the mid pipe to put the o2 sensor i dont think its the o2 sensor since its driving pretty good.

My leak was the elbow right off the pcv valve to the plume. Was hard to track down because the car would run great when cold but when it warmed up the plastic elbow was more malleable and the slit on the underside would allow air in.

tweety_5150 · January 27th, 2011, 07:14 PM

well today i checked the car turns out there was a loose ground so i connected it back and reset the check engine light hopefully thats it. if not ill have to chase a leak

January 26th, 2011, 09:52 PM	#1
tweety_5150 Enthusiast 2000 GT Convertible Join Date: Apr 2010 Location: Bay Area Cali Posts: 676 iTrader: 1 reviews	Code P1131 So this weekend I have my sub frame connectors welded in while they did that they changed the o2 sensor it developed a exhaust leak so I had the exhaust flanged gasket changed so I dont hear a leak anymore but im getting the code p1131 any ideas what it could be by the way the car runs good so im not sure if its the o2 sensor

January 26th, 2011, 10:37 PM	#2
PhxMustang Regular 2002 Mustang GT 4.6L Join Date: Aug 2010 Location: Phoenix, Az Posts: 450 iTrader: 0 reviews	When I got the same code my issue was a vacuum leak. Be odd that you would develop a leak right after sub frame connectors were installed seeing how there under the car. But it’s easy to check for. __________________ Steeda UDP, K&N CAI, FlowMasters 40’s, Polly Mounts, Aluminum D/S, Chrome Moly Flywheel, Centerforce DF, MM (quad, cable, adj.), Lakewood LCA’s, MM FLSFC’s, Predator canned 93 tune.

January 26th, 2011, 10:49 PM	#3
cliffyk Hardcore Enthusiast Join Date: Feb 2007 Location: Saint Augustine, FL Posts: 1,808 iTrader: 1 reviews	P1131 (bank 1, front sensor) has the same possible causes as P1130, click here for more. I would get under there and check the wiring--there is of course a possibility that when they replaced the gasket the O2 sensor connector or wires got tugged on and damaged... __________________ -cliff knight- My Mustang 2003 GT, UPR X, 24lb/h injectors, Magnaflow, 180° stat, PP 70mm TB & plenum, DF Commando, Steeda UDPs, Ralco RZ_flywheel, RAM HDX clutch, WX EFX COPs 3.73s, 262 rwHP/305 lb-ft. Flex-fuel: burns gas and rubber...

January 26th, 2011, 11:22 PM	#5
Aquarius Regular 2003 Mustang GT Join Date: Jul 2008 Location: RI Posts: 89 iTrader: 0 reviews	Just because the car is driving well doesn't rule out the O2 sensor. I chased DTCs (P1131 and P1151 amongst others) for almost a year and my was driving great. Turns out pieces of my cats broke off, clogged up my Flowmasters and the exhaust gas was condensing inside the pipe - my O2 sensors were shorting out. What's your exhaust set-up? Cats or no cats? If it's a front sensor, try switching it from the left side to the right side and seeing if the code follows the sensor. __________________ 03 True Blue GT - Kenne Bell 1.7 Intercooled 9 PSI - Tunable Induction CAI - BBK 70mm TB - BBK Long Tubes - BBK Catted (but gutted) X - Bassani Stainless Cat-back -Tuned with Sniper by Gearheads Performance ---> 383 RWHP/390 RWTQ

Threads Similar to: Code P1131
Thread	Thread Starter	Forum	Replies	Last Post
Dtc code p1131 and p1151 keeps coming up	Mustang03	99-04	21	October 6th, 2011 11:15 AM
p0135, p1131 help please	BlK99StAng	Modular Mustangs	0	June 4th, 2010 10:07 AM
OBD II code p1131	stephen	V6 Mustangs	0	January 20th, 2009 08:29 AM
DTC's P1151, P1131 - How to fix it	Aquarius	99-04	10	January 16th, 2009 01:04 PM
p1131	Blackblurr_00GT	99-04	13	March 2nd, 2008 10:33 PM

January 27th, 2011, 12:28 AM	#6
tweety_5150 Enthusiast 2000 GT Convertible Join Date: Apr 2010 Location: Bay Area Cali Posts: 676 iTrader: 1 reviews	Its stock other than some super 44 mufflers.

January 27th, 2011, 07:14 PM	#8
tweety_5150 Enthusiast 2000 GT Convertible Join Date: Apr 2010 Location: Bay Area Cali Posts: 676 iTrader: 1 reviews	well today i checked the car turns out there was a loose ground so i connected it back and reset the check engine light hopefully thats it. if not ill have to chase a leak

Remove Advertisements Sponsored Links
Ford Mustang Forum Advertisement

All times are GMT -4. The time now is 06:02 PM.
Contact Us - Modded Mustangs : Ford Mustang Forums - Privacy Statement - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2012, Jelsoft Ent. Ltd. & SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.