View Full Version : P1131 CE codes
kwg2371
07-21-2008, 01:55 AM
I'm getting a P1131, But I'm getting great gas mileage:confused:
From what I have read one here it could be a vac leak or a bad gasket, O2 sensor???
I'm getting 32-33.5 miles to the gallon.
I have a 99 mtx 2.5L v6.
Any input:confused:
kwg2371
07-21-2008, 02:14 PM
I also just changed my fuel filter last week.
brapple
07-21-2008, 02:34 PM
P1131Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1.
O2 sensor is starting to go, time for a new one.
kwg2371
07-22-2008, 02:08 PM
P1131Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1.
O2 sensor is starting to go, time for a new one.
If that is the case wouldn't I be getting bad gas milage?
gamiller
08-08-2008, 01:55 AM
If that is the case wouldn't I be getting bad gas milage?
Not if it's reporting that you are too lean!
kustomcougar
08-08-2008, 01:58 AM
i also have the P1131 cel, let me know what fixes it when you figure it out
kwg2371
08-08-2008, 03:19 AM
i also have the P1131 cel, let me know what fixes it when you figure it out
Can do I think I'm just gonna go to the ford dealership and have them see what they can do I cant seem to get the damn CEL to turn off:banghead:
gamiller
08-08-2008, 10:55 AM
Be careful, the dealership likes to throw parts at the problem. They installed a new MAF on my ATX Cougar for $350 but that didn't solve the problem, which was just a $75 O2 sensor.