C5 Messages to Driver
Thread Starter
Instructor
Joined: Sep 2011
Posts: 208
Likes: 2
From: Tulsa Oklahoma
C5 Messages to Driver
I just got a C5 and was pleasure riding up the freeway when I began getting messages 'Low Fuel' (I just filled it) - High air pressure LF - High air pressure LR -. I am doubtful the tire pressure is high but I will check them. Is this a computer malfunction?
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
The first thing to do is to verify if the readings are accurate or not. If I remember the TPS sensors will trip the high pressure warning if they hit 41psi but I'm truly not positive. The fuel thing could be the tank level dropping to zero even though you just filled it which is a common issue that using Techron, usually fixes or at least helps. Pull your codes using the DIC just in case.
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
The low fuel warning probably came about due to sulfur build up on the fuel level sensor. As somebody said previously try adding some Chevron Techron in a couple of tanks of gas and see if it corrects itself. Tire pressure warnings come on when the tire pressure is too low or too high. High pressure warnings usually turn on at 42psi. More than likely the previous owner set the pressures too high. Cold tire pressure setting is supposed to be 30psi as indicated by the label in the door opening. The only time it is different than that is if you are running some sort of track tire. There are a number of people for some reason who set the cold pressure at the max load pressure indicted on the sidewall of the tire. That pressure is too high. So make sure the pressures are set at 30psi cold.
You probably will not see any codes related to the fuel level or the tire pressures since those warnings are normal operation of the car.
Bill
You probably will not see any codes related to the fuel level or the tire pressures since those warnings are normal operation of the car.
Bill
