Where do I start by fixing diagnostic code p0719 ?

Clean throttle body bore and plate of any carbon and the idle air control solenoid passageway .

sounds like the timings out

code p 0719 refers to torque converter/brake switch B---circuit low====causes --wiring short to ground --torque converter /brake switch---ECM/TCM

Does engine stumble and idle too low and die? This can be tune up issues, dirty idle air motor, dirty or sticking EGR, bad coolant temp sensor, clogged cat converter or muffler, bad O2 sensor, weak coil of bad ignition module, and more! You need diagnostic tests and readings.

engine dies when shifting into reverse or drive - Third Generation ...

www.thirdgen.org/forums/tbi/346079-engine-dies-when-shifting.html

Feb 11, 2006 - engine dies when shifting into reverse or drive ... After it dies it starts right up and idles fine in park or neutral. ... these ignition items because you weretrying to cure the stalling, or, did the stalling occur after you replaced these items? ...The only thing that kept the car running was adjusting the Idle screw up.

Engine Dies When Placed In Gear***Split from Spittybug...EFI ...

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Jul 5, 2012 - 18 posts - ‎4 authors
Just to give an update on my car - I've been having an issue with the car stalling when moving from Park into Reverse or Drive (I have automatic). ... I have been playing with the idle advance trying to get more ... I put in the remainder of the AT fluid I had on hand and the car never died on shifting after that.

starts but dies when shifted into drive or reverse - Suzuki Forum

There are many things that can contribute to this problem. It sounds like it may be ignition related. Possibly an ignition control module or ignition coil. The check engine light coming on while driving is the key to finding the problem. The light comes on when the computer finds a problem and will then store it in its memory. Have the codes checked for what the computer has found to be at fault and with a little diagnostics, should lead you to the problem

You should first get the engine scanned for trouble codes.
Try a new fuel filter, or have the fuel pressure tested. If fuel pressure is good, try some injector cleaner. If still no help, time for a tune-up with new plugs and wires, filters, pcv valve. If still no help, possibly the catalytic converter may be plugging up, or your egr valve needs cleaning. Could be a lot of things-you just have to start eliminating one by one. short of a shop running diagnostics and testing to find the problem. Good luck.

Sorry for the delay,having my shoulder rebuilt. The gaskets between the upper &lower plenum are a steel/plastic assembly,known to crack and cause a vacuum leak. This will cause a hard start cold and a higher than normal idle when warm.Usually by the time you notice these things the check engine light is on, indicating the idle speed is out of range.The intake can be separated,just enough,to replace the gaskets without removing fuel lines etc.find an experienced Isuzu or Honda technician..It should be about 1.5-2 hour job

First buy the alldata subscription for your unit and read the engine power management system, once you understand this then you will see you don't need a scanner, you can code out if it's a engine problem then read the codes itself with a paper clip. Then once you get the codes post them here to get a better answer, the more information you can provide the better the answer you will get. A digital test meter will be better than a scanner. Without understanding the engine management system you won't be able to fix it without replacing a lot of parts.

all the sudden the check engine light came on and it started to idle funny and dying at stops. I had a diagnostic done on it and changed out the idle air control valve but it doent seem any different. and the check engine light is still throwing the same code. we adjusted the idle up so i could drive it with out it dying but it is still acting funny.