• Register
Need A Repair Shop?
Find local automotive repair shops in your area.
AutoCodes.com Shops

38.8k questions

28.6k answers

1.2k comments

32.2k users

code tells me lack of switch HO2811 whitch causes it to run lean. were or what is this switch? does it have Ford number?? it came under code P1131.

Vehicle: 1999 ford ranger flex fuel 3,0 engine
by

1 Answer

P1131 Lack of H02S Bank 1 Sensor 1 Fuel trim at limit

This code condition is for the the 02 sensor at Bank 1, being sensor 1 this is the upstream 02 sensor. What set this code is either the 02 sensor is not properly connected or the 02 sensor has degraded,

 What this code stands for is that the 02 sensor on Bank 1 has stoppped switchng, what can cause the 02 sensor from switching is a vacuum leak that will cause a lean condition, The 02 sensor not properly connected, or a failed 02 sensor

 A good 02 sensor will switch from lean to rich its voltage would go from 0.250 volts to 0.850 volts which is the reflection of a good working engine and being in fuel control.

by (10.8k points)

Related questions

Home - For Shop Owners - About AutoCodes.com - Privacy Policy - Terms and Conditions - AutoCodes.com Feedback - Copyright 2010-2019 AutoCodes.com

AutoCodes.com - Engine-Codes.com - HelpForCars.net - Infinitihelp.com - Nissanhelp.com
...