What engine do you have?
Xtool OBD2 and trouble codes
I've been having some issues, current P050D-00 and occasionally P0300-00 on my 2017 GMC Sierra 1500 5.3L. I bought an Xtool A30M scan tool. Like a lot of guys here, I am a DIY/certified YouTube mechanic. When reviewing live data, there's certain "triggered alarms", mainly in the ECM live data screen referencing 5v reference 1, 3 & 4 under different screens. For example, induction data will have MAP and MAF lit up red along with 5v reference 1,3,4 but values are within spec. Then the Crankshaft sensor will also be lit red but only with 5v reference 1. Other triggered sensors are Transfer Case Range Postion sensor, Fuel Pressure Regulator. But like I said, they are same values compared to a similar engine. One thing I've noticed on some sensors is a "incomplete" or "not learned message. Another thing is certain sensors like the Steering Wheel Angle Sensor will have normal values when turned to the right and triggered when turned to the left past the 0 value. Anyone know where I can get a complete list of value references (cheat sheet) for scan tools, or understands these systems I'd really appreciate your help... and yes, I already reached out to Xtool support, there is a huge language barrier and they will ignore if you can't provide an order number. I bought the scanner through Amazon from the Xtool official, but whatever...
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Some of those orange flag things look odd. Like reading 5.01 volts instead of 5v. I would focus on the trouble codes. P050D - cold start rough idle, P0300 misfire multiple cylinders. Do you have any other codes? Could be a fuel, air, or spark supply issue. Given the cold start code makes me think vacuum leak that seals up when the engine warms up. But that's just a guess. Any sensor exposed to heat could exhibit a similar condition.
Can you give a screenshot of the engine control module live data too? All of the screenshots above are from transmission, transfer case, power steering modules etc. it seems like an engine control problem
Can you give a screenshot of the engine control module live data too? All of the screenshots above are from transmission, transfer case, power steering modules etc. it seems like an engine control problem
Some of those orange flag things look odd. Like reading 5.01 volts instead of 5v. I would focus on the trouble codes. P050D - cold start rough idle, P0300 misfire multiple cylinders. Do you have any other codes? Could be a fuel, air, or spark supply issue. Given the cold start code makes me think vacuum leak that seals up when the engine warms up. But that's just a guess. Any sensor exposed to heat could exhibit a similar condition.
Can you give a screenshot of the engine control module live data too? All of the screenshots above are from transmission, transfer case, power steering modules etc. it seems like an engine control problem
5.3L v8.... if that's what you meanWhat engine do you have?
Just fyi, the pics in post #4 have been too compressed/reduced to be readable, even when opening the image in a new tab and then blowing it up...
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Images Deleted
If I download the attachment on post #4 and view with Windows Photos app, it is readable at 90% zoom, however the attachment starts at parameter #299. I think what is needed is the photo from post #8 as an attachment instead of pasted into the chat box.
I might have to do this on my computer, I would love to add the entire pdf. I'll give this another chance.
I attached the entire PDF to the original post if anyone wants to take a gander at it... thank you in advance
From parameters (#11 - MIL requested No) and (#482 - 0 miles since DTC cleared) I assumed you cleared the codes and they have not come back immediately with the engine running which is good.
Your initial code P050D suggested a cold start issue, however parameter #32 ECT sensor is 179 degrees F so you may need to get all this data again during an actual cold start.
The only thing I found out of spec in the engine section was #41 ignition timing, about half of the values are below minimum spec.How many miles on the truck? (edit 171900km on the pdf, nevermind)Have you changed spark plugs and wires yet?
Something else odd was #453-#460 a/c disengage history, a few times battery voltage was out of range, a few times it was engine stall prevention. One time was engine coolant temp to high. Inconclusive but odd, maybe normal depending when they occurred.
Your initial code P050D suggested a cold start issue, however parameter #32 ECT sensor is 179 degrees F so you may need to get all this data again during an actual cold start.
The only thing I found out of spec in the engine section was #41 ignition timing, about half of the values are below minimum spec.
Something else odd was #453-#460 a/c disengage history, a few times battery voltage was out of range, a few times it was engine stall prevention. One time was engine coolant temp to high. Inconclusive but odd, maybe normal depending when they occurred.
Yes, I've done lots of maintenance to it and recently installed a diablo tuner on it since i have one or two aftermarket parts on it. The problems and symptoms are the same, if anything is worse, it's going to be the K&N CAI that just makes the hesitation louder. I took another screenshot when the check engine came back on with the freeze frame.
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Ditch the CAI. Common cause of vacuum leaks, letting in dirty air to the engine, etc. It really does nothing for power or MPG anyway.
I would agree with above about the K&N. Ditched mine too but your MAF seems to be working ok which is what usually gets messed up from K&N filter oil.
first pass through the data I didn't notice anything but there are a few videos on YouTube about this p050D code on your exact year make model engine. Typically bad injectors, sometimes vacuum leak. Your in closed loop and fuel trims look good so I am leaning towards fuel. The injector duty cycle looks good but the fuel rail temperature sensor 1&2 is stuck at -40degF which seems wrong (parameters #176&177). This could be your problem. Need to research more if there is a pinpoint test for those sensors
first pass through the data I didn't notice anything but there are a few videos on YouTube about this p050D code on your exact year make model engine. Typically bad injectors, sometimes vacuum leak. Your in closed loop and fuel trims look good so I am leaning towards fuel. The injector duty cycle looks good but the fuel rail temperature sensor 1&2 is stuck at -40degF which seems wrong (parameters #176&177). This could be your problem. Need to research more if there is a pinpoint test for those sensors
Can't find the test for the fuel rail temperature/pressure sensor but it is on RockAuto for $40. I would rather sign up for alldataDIY if it was me and get all the wiring diagrams to trouble shoot it. Looks like you have to pull the intake to swap it anyway (on the fuel rail) but with the diagrams you may be able to trace the wires back to the PCM or somewhere easier to test.
anyway, it seems more common on YouTube that carbon build up causes the injectors to fail by clogging the high pressure nozzle. There are a few videos of different people with the same problem so that seems most likely at this point. Still seems weird the fuel rail would be -40 degrees F though.
anyway, it seems more common on YouTube that carbon build up causes the injectors to fail by clogging the high pressure nozzle. There are a few videos of different people with the same problem so that seems most likely at this point. Still seems weird the fuel rail would be -40 degrees F though.
I already swapped it out and it's reading the same, that's actually one of the first sensors I replaced. I've swapped out several others like MAP, MAF and transfer case range position and they all read the same (5v reference triggered alarm). I'm starting to think I have a bad control module. Last thing I'm changing is my driver side door harness. There is an open wire in there for sure, window won't roll down when door is open but if I move the harness a bit it will. Just ordered it, I wouldn't be surprised if that's the culprit. I just realized that today.
Did a vacuum leak test with my DYI smoker. Did not have a leak, I did change the TB gasket and tightened down to spec before. It did get to a point I couldn't pump any more dude to build up pressure. Once I removed the pump, smoke started shooting out at the inlet pipe. So I'm confident there's no leak. Still waiting on the door harness.
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