Attention: TDR Forum Junkies 
Hi All,
First Gen owner, trying to help out remote pal with '05 2500 automatic 4WD, all stock, about 230,000 miles, routine maintenance. A few weeks ago he noted some "shaking" and had P codes 2146, 0202 and 1740 (Torque Converter Clutch or OverDrive Solenoid Performance). I did some reading on injector bank 1, and 1740, which I understand generally means there is a difference in RPM that shouldn't be, because of a bad O/D clutch, torque converter slipping or not working properly, or a bad connection or wire...a few people noted it can be caused by an engine DTC (like 0202 and 2146 above) and this seems reasonable to First-Generation me because if an injector wasn't operating correctly the "spike" in engine RPM might fool a sensor downstream to measure slippage.
I suggested he check the wiring around valve cover, AC compressor, control module, batteries, connections and so on. No obvious problems found.
He had his shop that rebuilt the transmission a few years ago check it out and they can find nothing wrong with the transmission--and it does operate as usual. The truck has thrown no further codes since they popped up and were reset a month ago, and a can of injector cleaner (unidentified) had a minor smoothing effect, but the shaking is still there, perhaps getting worse. The truck is said to start normally, shakes more when it's cold, you can hardly feel any shaking on the road, and mileage that used to show 20-21 now shows 17-19.
I don't have the FSM but do have electrical diagnostics pages for 2146 and 0203 (I figure it's the same process for 0202) and curious where would you guys start. Follow the electronic diagnosis for Injector 2, some short-cut for testing it, just assume with some degree of confidence the #2 injector is ready for replacement (and do all of them at once), or...?
Any and all input welcome, TIA!
First Gen owner, trying to help out remote pal with '05 2500 automatic 4WD, all stock, about 230,000 miles, routine maintenance. A few weeks ago he noted some "shaking" and had P codes 2146, 0202 and 1740 (Torque Converter Clutch or OverDrive Solenoid Performance). I did some reading on injector bank 1, and 1740, which I understand generally means there is a difference in RPM that shouldn't be, because of a bad O/D clutch, torque converter slipping or not working properly, or a bad connection or wire...a few people noted it can be caused by an engine DTC (like 0202 and 2146 above) and this seems reasonable to First-Generation me because if an injector wasn't operating correctly the "spike" in engine RPM might fool a sensor downstream to measure slippage.
I suggested he check the wiring around valve cover, AC compressor, control module, batteries, connections and so on. No obvious problems found.
He had his shop that rebuilt the transmission a few years ago check it out and they can find nothing wrong with the transmission--and it does operate as usual. The truck has thrown no further codes since they popped up and were reset a month ago, and a can of injector cleaner (unidentified) had a minor smoothing effect, but the shaking is still there, perhaps getting worse. The truck is said to start normally, shakes more when it's cold, you can hardly feel any shaking on the road, and mileage that used to show 20-21 now shows 17-19.
I don't have the FSM but do have electrical diagnostics pages for 2146 and 0203 (I figure it's the same process for 0202) and curious where would you guys start. Follow the electronic diagnosis for Injector 2, some short-cut for testing it, just assume with some degree of confidence the #2 injector is ready for replacement (and do all of them at once), or...?
Any and all input welcome, TIA!
