95 w/ several codes
#1
07-07-2009, 03:20 PM
95 w/ several codes
I have a 1995 chevy blazer 4x4 with the codes p0172, p0401 and p1133 showing. What do these codes stand for? I was told that I have a bad oxygen sensor somewhere. If I do, where are they located and can I change these myself?
Last edited by red winger; 07-07-2009 at 03:22 PM. Reason: needed to add more to it.
#2
07-07-2009, 09:32 PM
P0172 - Fuel Trim System Rich Bank 1
P0401 - Exhaust Gas Recirculation Flow Insufficient Detected
P1133 - HO2S Insufficient Switching Bank 1 Sensor 1
I would start with a fuel pressure test. If you have a leaking nut kit or a bad FPR, it can cause a rich condition and the insufficient switching on the O2 sensor.
Your EGR valve may be faulty as well. Try removing it and cleaning it and the ports that lead to/from it.
P0401 - Exhaust Gas Recirculation Flow Insufficient Detected
P1133 - HO2S Insufficient Switching Bank 1 Sensor 1
I would start with a fuel pressure test. If you have a leaking nut kit or a bad FPR, it can cause a rich condition and the insufficient switching on the O2 sensor.
Your EGR valve may be faulty as well. Try removing it and cleaning it and the ports that lead to/from it.
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