2018 Hino 195 COE
- Thread starter TGcville
- Start date
No, you have to connect a scan tool, preferably Hino DX2.
Having the same issue on a 2018 155. Ever find the fix? I have dx2 and an Ancel tablet. The turtle is attached to p016f. If I stop and restart it, the thing runs normally for a while until the next big hill.
Possibly unrelated is a nagging p206b.
Can start a new thread if needed. Thanks.
Possibly unrelated is a nagging p206b.
Can start a new thread if needed. Thanks.
P016F is a fuel system pressure control - low fuel pressure at high side fuel delivery related to power loss symptom.
As it happens intermittently - first thing is need to check any fuel leaks and fuel filter for restriction, if you are pretty sure that fuel filter is Ok then common faults is a fuel rail pressure limiter valve, suction control valve and faulty injector. If after fuel filter replacement problem is back then start with replacement of limiter valve, if no - then SCV valve and if same condition present then diagnose faulty injector that cause to pressure drop
As it happens intermittently - first thing is need to check any fuel leaks and fuel filter for restriction, if you are pretty sure that fuel filter is Ok then common faults is a fuel rail pressure limiter valve, suction control valve and faulty injector. If after fuel filter replacement problem is back then start with replacement of limiter valve, if no - then SCV valve and if same condition present then diagnose faulty injector that cause to pressure drop
Welp, that wasn't it. Since last November, it's had the head gasket replaced on my dime at the local Hino dealer with all the filters and whatnot to the tune of $9k plus the dpf and injectors under warranty. Still does the p016f thing and I cannot afford to pay them to fix it again so here we are. I have taken some of the fuel lines apart and checked them for crap to no avail. I've cleaned the tank vent and line and it makes a whirring noise when I blow through it like the ball is spinning. Is it supposed to do that?
I do have a laptop with dx2 and the proper USB link and an Ancel tablet setup that does most of the same things minus programming stuff which was much cheaper. Can see actual vs target pressures on merged graphs and the actual drops a good 30MPA below target if I try to pass while going up a hill at any speed over about 40. When I let up, it then overshoots up to 20mpa above target before getting back on track and has recently put up a p0088 for overpressure on a hot afternoon. Fuel temp was about 76c when that happened. I cleaned the crap off the fuel cooler behind the side filter that afternoon and the highest I've seen since was 71c, without p0088 reoccurring. Also noticed a lot of wiggle in the actual pressure line at high speeds like +/- 10mpa in a sawtooth shape that usually centers on the target line. Is this an scv showing its 240k mile age?
Will try the system split with a fuel can test the next dry afternoon I get off and post back what happens, unless anyone here has a better idea?
Thanks, folks for all you do here!
I do have a laptop with dx2 and the proper USB link and an Ancel tablet setup that does most of the same things minus programming stuff which was much cheaper. Can see actual vs target pressures on merged graphs and the actual drops a good 30MPA below target if I try to pass while going up a hill at any speed over about 40. When I let up, it then overshoots up to 20mpa above target before getting back on track and has recently put up a p0088 for overpressure on a hot afternoon. Fuel temp was about 76c when that happened. I cleaned the crap off the fuel cooler behind the side filter that afternoon and the highest I've seen since was 71c, without p0088 reoccurring. Also noticed a lot of wiggle in the actual pressure line at high speeds like +/- 10mpa in a sawtooth shape that usually centers on the target line. Is this an scv showing its 240k mile age?
Will try the system split with a fuel can test the next dry afternoon I get off and post back what happens, unless anyone here has a better idea?
Thanks, folks for all you do here!
The SCV is a suspect. Also, using DX2, go into system protection data and look at the recorded fuel temp. If it's over 200F that suggests a high rate of internal leakage in the pump.
Max fuel temp under system protection data shows 120*C, but I think that's because I started it without plugging the temp sensor back in a few years ago. Highest I've seen in live data was 85c up a steep hill on a 90f day with the pressure graphs doing the same game posted above.
Been meaning to tear into the banjos around the engine side filter and look for restrictions for a while now but keep getting distracted. My fsm looks like there are screens on both the cylinder head and filter head return fittings, one on the inlet to the feed pump coming from the primer pump and one on the banjo that goes into the high side of the pump and splits off to the 5th injector on the ATC. Does that sound correct? I remember some of those banjo bolts have tiny holes in them like they're restricted on purpose. Which ones should those be? I want to make sure they're in the right places. Thank you for your help and I'll try to motivate myself to get back in there this afternoon.
Been meaning to tear into the banjos around the engine side filter and look for restrictions for a while now but keep getting distracted. My fsm looks like there are screens on both the cylinder head and filter head return fittings, one on the inlet to the feed pump coming from the primer pump and one on the banjo that goes into the high side of the pump and splits off to the 5th injector on the ATC. Does that sound correct? I remember some of those banjo bolts have tiny holes in them like they're restricted on purpose. Which ones should those be? I want to make sure they're in the right places. Thank you for your help and I'll try to motivate myself to get back in there this afternoon.
I'm ADHD AF, so if I don't get notifications on my phone there's like a 2% chance I'll remember to follow up. I have hopefully set my phone correctly to get notifications. Has this been resolved?
Same though I don't have a diagnosis for what kind of neurodivergent I am yet. Life and hot af weather happened so I got distracted again. Maybe this weekend? Thank you for checking and I'll come back with results some day soon.
Gotta get this thing reliable enough to just flog it without the live data graphs showing me when to back it off. 40 mph up a 6%, 3 mile grade weighing 12k lbs at roughly 300' elevation and 80° weather isn't really all the beans these things have, right?
Almost seems like it's withholding fuel to keep exhaust or fuel pump temps sane without telling the p016f low fuel pressure trigger why, so it pops into turtle mode. Odd thing is that during a regen the fuel pressure is somehow programmatically limited and it will pull all the way up that same hill fully floored with zero problems.
Gotta get this thing reliable enough to just flog it without the live data graphs showing me when to back it off. 40 mph up a 6%, 3 mile grade weighing 12k lbs at roughly 300' elevation and 80° weather isn't really all the beans these things have, right?
Almost seems like it's withholding fuel to keep exhaust or fuel pump temps sane without telling the p016f low fuel pressure trigger why, so it pops into turtle mode. Odd thing is that during a regen the fuel pressure is somehow programmatically limited and it will pull all the way up that same hill fully floored with zero problems.
The banjo on the rail relief valve has tiny holes, the rest of the banjos that size are the same, I believe.
Probably the best thing to do at this point is to plumb an auxiliary fuel source directly to the pump inlet and go for a wide open test drive. This will rule out the entire fuel supply system. If it still sets this code then you're looking pump, SCV, relief valve as culprits. Remember to run the return line to your aux tank if you're having to drive more than 10-15 minutes.
I got my email notifications fixed, finally.
Probably the best thing to do at this point is to plumb an auxiliary fuel source directly to the pump inlet and go for a wide open test drive. This will rule out the entire fuel supply system. If it still sets this code then you're looking pump, SCV, relief valve as culprits. Remember to run the return line to your aux tank if you're having to drive more than 10-15 minutes.
I got my email notifications fixed, finally.
Would love a follow up on this since im experiencing the same problem to no avail. Pump and injectors were tested good, scv, rail relief valve, pressure sensor all replaced. ran off aux tank into engine filter inlet, and see bubbles forming on return line only during WOT. When you say plumb into pump inlet do you mean post filter as to eliminate lift pump and filter all together? or plumb into lift pump inlet so that it still runs through filter? Slight amount of metal was observed in filter, but diesel lab said pump tested good. About to just throw a pump at it at this point.
There isn't a separate lift pump (unless you are referencing the hand primer pump)The high pressure fuel pump has two pumps stacked together. I'm suggesting the elimination of the entire fuel supply system and connecting an auxiliary fuel supply directly to the pump.
Follow up on my issue, it seems the lab that tested and "rebuilt" my fuel pump will not be getting more work from me. New pump solved my issues. Once again greasytshirt thank you very much for you assistance.
I know that's not the conclusion you wanted, but I'm glad the problem is solved.