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Check Engine Light code - P1131 ? #985817 06/21/04 02:44 AM
Joined: May 2003 Posts: 63 M Myrosia OP CEG\'er
OP Myrosia CEG\'er M Joined: May 2003 Posts: 63	Hey guys. I have a 1999 Ford Contour with 86,000 miles. The check engine light came on today. I had Autozone check for the service code and it came out: "P1131 - Manufacturer Control Fuel Air Metering" Any idea what the problem may be? Can I troubleshoot it and fix it myself? Thanks guys! ~Maria~

Re: Check Engine Light code - P1131 ? #985818 06/21/04 03:50 AM
Joined: Apr 2003 Posts: 3,045 orange county, dprc (ca) J JB1 Hard-core CEG\'er
JB1 Hard-core CEG\'er J Joined: Apr 2003 Posts: 3,045 orange county, dprc (ca)	if i am not mistaken the 1131 refers to the o2 sensor on the front bank. basically you need a new one, atleast thats what i was told when my 99 csvt w/ 86000 miles threw a 1131 & 1151 recently. from what i understand it should be easy to fix yourself. i have not changed mine yet so i cannot say. soon enough others will post regarding whether or not i'm talking out my a--. 00 black/tan svt, #2052 of 2150, born 2/1/00 formerly known as my csvt "Nothing in the world is more dangerous than a sincere ignorance and conscientious stupidity." -Martin Luther King, Jr.

Re: Check Engine Light code - P1131 ? #985819 06/21/04 09:50 PM
Joined: May 2003 Posts: 63 M Myrosia OP CEG\'er
OP Myrosia CEG\'er M Joined: May 2003 Posts: 63	Thanks! Anyone else can help?

Re: Check Engine Light code - P1131 ? #985820 06/22/04 11:39 AM
Joined: Sep 2002 Posts: 1,788 St. Louis, MO P projectSHO89_dup1 Hard-core CEG\'er
projectSHO89_dup1 Hard-core CEG\'er P Joined: Sep 2002 Posts: 1,788 St. Louis, MO	P1131 is the REAR (firewall) side upstream O2 sensor. SEARCH on "P1131" for multiple threads on how to replace the sensor. Steve 98 Contour SE Sport 2.5 Duratec ATX The wifey's car 89 Taurus SHO - 246K miles 94 SHO ATX - 190K 1997 F-150 5.4L ATX - The Workhorse 150K. ANY THREAD WITH "OMG" or "WTF" ETC IN THE TITLE WILL BE IGNORED!

Re: Check Engine Light code - P1131 ? #985821 06/23/04 07:52 PM
Joined: May 2003 Posts: 63 M Myrosia OP CEG\'er
OP Myrosia CEG\'er M Joined: May 2003 Posts: 63	I cannot find how to change the O2 sensor. I have a 1999 Ford Contour L4-122 2.0L DOHC SFI Also, should I have anything else tested? Ps. That's odd - the check engine light just went off...what's that all about? ~Myrosia~

Re: Check Engine Light code - P1131 ? #985822 06/23/04 11:40 PM
Joined: Oct 2002 Posts: 2,408 R Rogerm60 Hard-core CEG'er
Rogerm60 Hard-core CEG'er R Joined: Oct 2002 Posts: 2,408	Originally posted by Myrosia: I cannot find how to change the O2 sensor. I have a 1999 Ford Contour L4-122 2.0L DOHC SFI Also, should I have anything else tested? Ps. That's odd - the check engine light just went off...what's that all about? ~Myrosia~ P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1. The O2 simply unscrews from the exhaust manifold between the engine and the radiator. Since this engine only has one O2 for fuel metering, there is no simple way to tell if the O2 is bad or if there is another problem affecting the mixture. Standard procedure for this code would mean cleaning the MAF, looking for vacuum leaks, and changing the O2. The CEL will come and go as the running conditions change. "Those who cannot remember the past are condemned to repeat it" -George Santayana

Re: Check Engine Light code - P1131 ? #985823 06/24/04 12:55 AM
Joined: May 2003 Posts: 63 M Myrosia OP CEG\'er
OP Myrosia CEG\'er M Joined: May 2003 Posts: 63	Hey Roger! Thanks!

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