yellow check engine light

A sensor of some sort. I know the truck I drive has a N14 Plus in it and the other day running down the road the engine light went off, alarms and no oil pressure. By the time I got to the shoulder the truck had shut off.

It would start and run for maybe 30 seconds and shut off. Didn't hear any knocking...had plenty of oil. Mechanic said to unplug oil sending unit and see what it did. Ran just fine. Check engine light stayed on. Hit the KW dealer, got a new sending unit and no issues.

 

first of all - pull codes with check engine button! seems to me no reason to tell you how to read blink codes. To be sure press button whith ign.off and hold, then turn ign. on and 5 sec later release button. You will clear all stored codes, then start engine and when it stalls pull code with button!

If it is engine protection code when you press shut down override button.... and.... engine will not stall in 30 sec.

Shutdown may be actuated with Low coolant, overheating, oil low pressure, oil overheating, on some models crankcase pressure (on volvos usually) ore coolant pressure. Faulty sensor may cause it!

well, if no engine protection codes engine may stall with low fuel pressure (lower 100 psi for N14), bad injector(s) that let exhaust gas come into fuel system in cyl. head (black nozzele needle syndrome) ore with faulty EPS (engine pos. sensor). Sometimes engine stalls with bad ECM power supply (kl. 30 usually, small red wire in battery box with 20A fuse).

Anyway - start with codes first

 

Chances are it for low coolant. Even though the level is full, with the engine sitting for that long some corrosion will still form on the tip of the coolant level sensor. With even minor corrosion the sensor tip is covered and won't sense the coolant.

 

Low oil pressure? Engine protection function stalls engine before any internal damage happend... N14 is tought like a rock, but there are some oil pump, and cam related issues. try new oil filter first! and sometimes fuel slowly come to oil and causes low oil pressure syndrome.

 

434 - low battery voltage... may be bad battery, may be corroded terminals, may be wiring (very thik wires)... 434 appeares when bat. voltage is lower 6V.

Be carefull! to many times you'll get 434 and finally 111 code (internal controll unit fault) will appeare! I use to fix 111 every winter when trucks are operated with bad batteries