Question about 1998 GMC Yukon
P1133 is B1S1 oxygen sensor not switching properly. Likely due to failed sensor. Could be due to lack of fuel (filter, pump,) or bad MAF sensor, even leaking intake manifold
Posted on Apr 03, 2015
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Posted on Jan 02, 2017
check for plugged fuel filter on the frame rail on driver side, blow through it to see if it is plugged. also have fuel pressure checked if it is below 60 psi replace fuel pump
Posted on May 08, 2009
P1133 - Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor 1
I would have the repair shop see if they either damaged or left disconnected the oxygen sensor for engine cylinder bank one upstream sensor, this sensor would have been disconnected if the oil pan was removed.
Posted on Apr 20, 2009
P1133 HO2S Insufficient Switching Sensor 1
THIS IS THE O2 SENSOR CLOSEST TO THE ENGINE AND BEFORE THE CONVERTER.
AN EXHAUST LEAK OR A BAD SENSOR COULD BE THE PROBLEM.
CHECK THE O2 SENSOR WIRING FOR DAMAGE, CORROSION, ETC.
Posted on Jul 11, 2009
Code p1131 manufacturer control fuel air metering, on a 2003 Ford Taurus. Where is part? Is there an easy way to see if it can be fixed without buying the expensive part?
Posted on Sep 01, 2009
SOURCE: 2003 GMC Yukon - fuel pump
Check your ECM fuse. There should be 2 fuses for your ECM. It's the ECM that controls the function of the fuel pump. Good luck friend and it's also common for the wire harness from the frame to the fuel pump to go bad due to corrosion from the bad weather we get in the winter and rainy spring and fall.
Posted on Sep 04, 2009
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