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Automotive Repair Car Troubleshooting Topics   Car Troubleshooting   Engine Troubleshooting   Engine Fault Codes   Electrical and Wiring   Transmission Problems Car Repair Topics   Car Making Noises   Car Stereo Repair   Heating or AC Issues   Motorcycles and ATVs   Tricks of the Trade   Truck Repair Advice Site Options:      Login   Sign up here! Latest Forum Post   2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes When I bought this car in summer 2023, a... Grounding Cable, 2017 Jeep Renegade Trailhawk The Cable that connects my negative batt... Rough Idle (Found new thing) Hi everyone. First of all sorry for bad ...     equipment hey yall. im a first year engineering st...   HELP I have a 1956 1/2 ton panel truck, 69 35...   Howdy     Just wanted to s...   ABS/Tractiob/Brake Lights on But No DTCs Hello all, Recently while driving m...   Chevy strut replacement I'm trying to get a sensor of some kind ...   2020 suburban new transmission and issues after install recently had the transmission fail at 11...   Caliper piston post cleaning won't screw in Hello, 2013 Hyundai Elantra limited (ma...

Search Auto Parts Search 20'05 International School Bus - O2 Sensor Issues Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Engine Troubleshooting PontiacPower New User Jan 25, 2014, 5:08 PM Post #1 of 3 (1466 views) 20'05 International School Bus - O2 Sensor Issues Sign In Hello, everyone. I have a 2005 International school bus and have encountered an odd problem with my O2 sensor and the problem is recurring. It all began about five months ago when the bus began putting out clouds of black, cold exhaust. I took it into a truck shop to discover that the O2 sensor was shot. We replaced it but not even a week later the sensor goes out again. We replace it once more, only for it to go out... yet again! Does anyone here with diesel vehicle knowledge have any idea on how to fix this? Additional Information: Year of vehicle: 2005 Make of vehicle: International (IC Bus) Model of vehicle: BE Series Bus Engine size: MaxxForce® 7 Milage/Kilometers: 157,053 Miles kev2 Veteran Jan 25, 2014, 5:36 PM Post #2 of 3 (1453 views) Re: 20'05 International School Bus - O2 Sensor Issues Sign In   something is not right- luckly you can access the PCM, look at codes - engine sensor readings etc. I suspect the o2 sensor would set codes as it 'fails' you have not mentioned anything about codes or scanning etc so I want to mention as it is a missing piece of the puzzle. Most likely the o2 sensor is not the culprit but is being affected by another issue likely - fuel issue, is this a international dealer? nickwarner Veteran / Moderator Jan 26, 2014, 10:56 AM Post #3 of 3 (1430 views) Re: 20'05 International School Bus - O2 Sensor Issues Sign In O2 sensor? Thats not making much sense in a diesel. What is the exact model of the engine? Most IH busses use the DT466E motor. You are obviously overfueling. I wonder if this "O2" sensor is actually the EGT sensor and being confused by someone not familiar with these. I don't have access to the guides on the HD diesels right now, but you may be able to find some info for how to get blink codes out of it on YouTube or something. Thing is you're going to need a shop with an ISIS subscription to get much troubleshooting info out of the codes. I would start looking at some basic things here, which you may or may not have the tools to do. Get the CAC pipe off of the turbine outlet and have a very good look at the turbine blades. If you find any cracking or damage you will need a new turbo. If there is a bunch of oil inside the housing you will likewise need a turbo, as the seal for the turbine bearing is gone. If you have any broken blades you not only need to replace it you need all the ducting to the CAC through to the intake taken apart and cleaned of debris. If the turbo is still intact you will want to verify what boost levels you get. You need to plumb a gauge into the pipe going into the intake. Should be a pipe plug somewhere along there you can tap into with a gauge. Take it for a drive and accelerate, watching to see how much boost you can make. If its very low, your ECM will end up overfueling as it is expecting more air than it is getting. You get black smoke from that. If you are getting low boost you will then want to perform a pressure test of the entire CAC system to see if the boost is bleeding off through leaks. Forgot to mention at the top, first thing you need to be checking is the air filter and ducting heading to the inlet of the turbo. If its plugged up or the filter is damaged it will restrict airflow. See a lot of that mostly on agricultural applications that are around a lot of grain dust but still possible in OTR type is its parked a lot. Maybe even a mouse nest in the air cleaner.   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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