Problem: The customer complained of
intermittent problems with the head lamps going off and on by
themselves and fuel pump staying on, even with the key off. There
were other random, intermittent electrical problems too. The
malfunction indicator lamp (MIL) was on.
The tech connected a scan tool and found a DTC P0088 – Fuel Rail
Pressure (FRP) Too High. This code sets if the following
conditions are met:
The actual FRP is more than 20 MPa (2,900 psi) above the
desired FRP, or
The actual FRP is more than 1,89 MPa (27,412 psi)
Often, when a P0088 DTC sets, it can cause a fuel knock and smoke
condition. There may or may not be any drivability concerns. The
code can also set if the FRP regulator is sticking. The tech
checked for these other symptoms and found none.
Next, the tech inspected the under-hood fuse box and noticed the
cover was cracked and missing a piece. He removed the cover and
found the fuse box was full of corrosion. Unfortunately, the
customer couldn’t afford a new fuse box.
Confirmed Repair: A good, thorough cleaning
with baking soda removed all the corrosion. The tech
double-checked every fuse connector – no corrosion and the fuses
all fit tight – and he repaired the crack in the fuse cover with
silicone sealant. The gremlins were eradicated, and all the
electrical problems were fixed!