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The sensor is in the exhaust, it is the first temp sensor in the exhaust system and it is between the turbo downpipe and the NAC. It is saying it is open, so perhaps it is loose/unplugged, I'd say look at that first. I don't think you need to be too concerned as you don't have any other temp...

This is not a good idea... . especially on a 6. 7. The grid heater helps the engine to start, they are a replacement for glow plugs, sure your engine can start w/o it, but having your grid heater cycle is not bad for an engine. Also, the grid heater heating up will help to keep it relatively...

First turbo: you said you had a bearing failure, if it indeed was a bearing it was the turbine shaft bearing in the bearing housing. High Idle: Automatic cold start high idle feature? The trucks will always idle higher in cold temperatures, this is not a feature that can be added/removed...

Sag2 mentioned the rear dif break in, but 500 miles is also for the transmission. The 68RFE has a "learn" mode, the 500 miles will allow the transmission to learn and then it will re-learn once you start towing a trailer. During towing when the transmission has re-learned the shifts will be...

The intent of the flashes is not to give more HP, but to fix problems that are being seen by people around the country, for example some of teh updates have fixed MIL lights from coming on for various false failures. Some of these flashes may lead to a marginal increase in MPG, but not...

Agreed w/ others... . NEVER pay for a manual regen. Those attempted regen #'s are crap anyhow, if your truck has not regened it would have died already. A lot of t he issues w/ regens have been fixed throughout '07 and '08, so now you should be good as can be. And NO an OBD reader will not...

Synthetics wont necessarily buy you 2X improvement in oil change intervals, recall that the oil change monitor goes off when the fuel-in-oil dilution reaches a threshold. Synthetic oil will not assist/give you more miles with too much fuel in the oil, it is the same as with conventional. It is...

Unfortunately this is incorrect, the shaft/wheel is balanced for every turbo, simply replacing one component will be as bad as running the truck with the defect. Some folks remove the silencer ring to get a bit more turbo noise. In order to fix this problem the turbo needs to be replaced. Also...

massdiesel is right, you need an intake system pressure test... ... sounds like you have a leak somewhere

The cruise control myth is a product of a uninformed dealer and technician. There used to be a screen in the StarSCAN tool which stated that during a mobile desoot that cruise control had to be off in order to work. No idea why this was there, but cruise control DOES NOT disable regen. I heard...

Well, Cummins "approves" oils besides Valvoline (they just happen to co-brand with Valvoline Premium Blue). Here's from my owner's manual: "For best performance and maximum protection under all types of operating conditions, the manufacturer only recommends engine oils that are API CJ-4...

Coalsmoke - Oil wars, I love it! For what it's worth, Cummins fills with Valvoline at the factory, but as long as an oil meets API CJ-4 standards then it is acceptable in the 6. 7, whether it is Pennzoil, Valvoline, Mopar, Uncle Tony's, yada yada. That being said, a lot of folks are brand...

Should be correct, R is after Q

I have heard of that before... . but it is rare. More than likely there was a internal malfunction with the ECM which caused failure. Please ask the dealership what codes you have, there is a P0606 code which usually means an internal hardware problem w/ the ECM - this will light the check...

sag2 is on the money, as usual... ... looks like this code will set if the delta p tubes are reversed or broken, but also if there is an exhaust system leak, the sensor has failed, electrical issue, or the DPF is cracked (but a cracked DPF will soot the tailpipe). More than likely it is a simple...

Your mileage certainly is not a problem, that is the best I have heard of - what's your secret? As far as O2 sensors and turbos, I'm sorry to say but join the club. There are various posts around here on both issues, but there are a lot of folks have seen the same issues. Here are some threads...

My opinion... . #1 - If you don't notice a performance difference, then there may be no need. 500 miles should be plenty of time to see if there are any issues with airflow, but w/ no valve there is never the opportunity for your fresh air to get obstructed #2 - Not sure it will, if it has not...

It doesn't load the engine, per se, but the sliding action does "scrape" soot away which can cause the nozzle to stick (sticky nozzle equals P2262). This page has a little animation on a VGT, it is air actuated (ours are electronically actuated), but it gives a good idea of what's going on...

Back pressure from the DPF can increase soot in the turbo, but only excessive backpressure (DPF plugged and your truck's on the side of the road kind of stuff. ) To put it simply, combustion is the main reason (but, again, not the only reason) for soot in the turbo. There are various operating...

P042E is "EGR control stuck open"... dealership should clean your EGR valve and that should fix it, the valve has excess soot which is not allowing it to close all the way.