SneakyAnarchistVanCamper
Reading till my eyesbleed
Well first off I need a new connector for the ambient air temp sensor. It is missing, hacked and taped up by the P.O. I'm wondering if it could cause a check engine light, a shutdown at a stoplight, and these codes:
B1471 ambient temp sensor has open or short to positive
2015-1 CEL On & Current fault - Rail pressure monitoring. The maximum fuel flow quantity was exceeded.
2047-1 CEL On & Current fault - Rail pressure monitoring via volume control valve. The maximum rail pressure was exceeded.
2017-1 rail pressure monitoring. Rail pressure is too low.
Rail pressure during 2047-1 code: 577bar/8368 psi
Y74 pressure regulator valve: 29%
Fuel tank level 48 (half full)
During a different instance of 2015-1 code:
934 bar/13,456 psi set value
Rail pressure 496 bar
Y7r pressure regulator valve 30%
According to europarts ". Although small and seemingly insignificant, this is a critical sensor, signaling outside air temp to the engine control module." -True??
I changed the fuel filter (was pretty clean upon disassembly) after I first got the CEL and the 2047-1 max rail pressure code. Plenty of power, running just fine, but then the other night after changing the fuel filter and after a 30 minute and then a 10 minute drive, it turned on the CEL (same codes as above) all of a sudden it shut the engine off at a stoplight once it turned green. Nothing on the LCD display but it was lit up, and after a few attempts to turn the key from position 0 to position three, it started up and got me home. Earlier that day, I primed the new fuel filter by turning the key to position 2, letting it sit, and repeated. But I didn't open the WIF drain. Wondering if I just introduced a bunch of air into the system, causing it to later shut down?
Dr A told me to check low side fuel pressure with a T and a pressure gauge at the filter, because these codes can often mean it's not getting enough pressure/flow, as opposed to too much (because of overshoot). I can't till the shop is open monday. I opened the WIF drain and closed it down not too tight this time, to inspect the fuel for air bubbles and contamination, neither were found, and it filled up a plastic water bottle in about 1 second. In hindsight I should have used a gallon container..
So I need to know if the ambient temp sensor could be the culprit of all this. And I'm wondering what my next step would be. I'm worried she will break down any moment. The fuel quantity control valve on the HP pump regulates the pressure going to the rail, right? My fuels instructor said the inlet metering valve aka quantity control valve on the hp pump is to be suspect- should I just replace it?
Edit: The connector ( 05120749AA ) and terminal ( 05103880AA ) are actually in the parts manual, so I'll order those. Jw if it's irrelevant or not cause I've found conflicting data.
B1471 ambient temp sensor has open or short to positive
2015-1 CEL On & Current fault - Rail pressure monitoring. The maximum fuel flow quantity was exceeded.
2047-1 CEL On & Current fault - Rail pressure monitoring via volume control valve. The maximum rail pressure was exceeded.
2017-1 rail pressure monitoring. Rail pressure is too low.
Rail pressure during 2047-1 code: 577bar/8368 psi
Y74 pressure regulator valve: 29%
Fuel tank level 48 (half full)
During a different instance of 2015-1 code:
934 bar/13,456 psi set value
Rail pressure 496 bar
Y7r pressure regulator valve 30%
According to europarts ". Although small and seemingly insignificant, this is a critical sensor, signaling outside air temp to the engine control module." -True??
I changed the fuel filter (was pretty clean upon disassembly) after I first got the CEL and the 2047-1 max rail pressure code. Plenty of power, running just fine, but then the other night after changing the fuel filter and after a 30 minute and then a 10 minute drive, it turned on the CEL (same codes as above) all of a sudden it shut the engine off at a stoplight once it turned green. Nothing on the LCD display but it was lit up, and after a few attempts to turn the key from position 0 to position three, it started up and got me home. Earlier that day, I primed the new fuel filter by turning the key to position 2, letting it sit, and repeated. But I didn't open the WIF drain. Wondering if I just introduced a bunch of air into the system, causing it to later shut down?
Dr A told me to check low side fuel pressure with a T and a pressure gauge at the filter, because these codes can often mean it's not getting enough pressure/flow, as opposed to too much (because of overshoot). I can't till the shop is open monday. I opened the WIF drain and closed it down not too tight this time, to inspect the fuel for air bubbles and contamination, neither were found, and it filled up a plastic water bottle in about 1 second. In hindsight I should have used a gallon container..
So I need to know if the ambient temp sensor could be the culprit of all this. And I'm wondering what my next step would be. I'm worried she will break down any moment. The fuel quantity control valve on the HP pump regulates the pressure going to the rail, right? My fuels instructor said the inlet metering valve aka quantity control valve on the hp pump is to be suspect- should I just replace it?
Edit: The connector ( 05120749AA ) and terminal ( 05103880AA ) are actually in the parts manual, so I'll order those. Jw if it's irrelevant or not cause I've found conflicting data.
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