Mitchel3408
Member
Hello all, my wife’s LR4 is giving P0627 and P018B codes.
Background: The alternator failed the other day while driving and we towed it home and I replaced the alternator. The charging system light stayed on and I saw 13.6v at idle. I ordered another new alternator and told her to drive it until it came in. Before it came in the truck died in the middle of the street and gave the P0627 code. I towed it home and got the new alternator in and saw 14.8 volts. No codes came in while it idled, I took it around the block and as I backed into the drive way it died and would not restart. I got the P0627 and P018B codes.
I’m assuming that the first alternator I put in damaged something electrical in the fuel system, pump perhaps? But the P018B code is throwing me off. I read the fuel pressure at idle after the second alternator change and saw ~420 psi.
My thoughts are the low pressure fuel pump is bad, the controller/relay is bad, or a sensor is bad and shutting off the pump.
Anything thoughts or tests to run would be appreciated! I hate to just start throwing parts at it.
Background: The alternator failed the other day while driving and we towed it home and I replaced the alternator. The charging system light stayed on and I saw 13.6v at idle. I ordered another new alternator and told her to drive it until it came in. Before it came in the truck died in the middle of the street and gave the P0627 code. I towed it home and got the new alternator in and saw 14.8 volts. No codes came in while it idled, I took it around the block and as I backed into the drive way it died and would not restart. I got the P0627 and P018B codes.
I’m assuming that the first alternator I put in damaged something electrical in the fuel system, pump perhaps? But the P018B code is throwing me off. I read the fuel pressure at idle after the second alternator change and saw ~420 psi.
My thoughts are the low pressure fuel pump is bad, the controller/relay is bad, or a sensor is bad and shutting off the pump.
Anything thoughts or tests to run would be appreciated! I hate to just start throwing parts at it.