I have a 2007 Honda CR-V EX with all-wheel drive. I began having a problem with the digital fuel gauge and fuel odometer, two features I’ve never had on a vehicle before.
As I’m driving, the digital bar showing how much gas I have left in my will suddenly disappear, the number showing how many miles I have left to drive before running out of gas will disappear and get replaced by a bunch of dashes, and the low fuel level light will start flashing. Then after a while, everything will start displaying properly again.
There doesn’t seem to be any rhyme or reason as to why this is happening. My check engine light hasn’t come on, so I’m not getting any codes for it.
Last time I had that problem it was a PCM problem but the car was an 85 Cadillac. PCM cost me $100 and it fixed the problem which also affected performance badly.
There is possibly an intermittent open circuit in the fuel level sensor inside the fuel tank. The fuel level sensor is usually an input to the PCM, BCM or instrument cluster, the problem can be verified with a scan tool. Lack of a check engine light does not prove that a fault has not been recorded by one of the modules.
I just looked up the resistance specs for your fuel level sender . . . on Rockauto, fwiw
full = 20 ohms
empty = 780 ohms
Here’s what I would do . . .
Gain access to the fuel module connector, possibly under your rear seat. I’ve never worked on a CR-V, so forgive me if I’m wrong
Unplug the connector and hook up your decade resistance box to the appropriate terminals going up front to the cluster and simulate a full and empty tank, and also 1/4, 1/2 and 3/4 for good measure. You’ll have ignition on when doing this, so that the gauge will hopefully move up and down, according to what you’re simulating. If the gauge reads correctly, then you know the gauge and the wiring all the way from the fuel module to the gauge are good and your problem’s in the tank, most likely you need an entire fuel module, complete with pump, fuel level sender, fuel pressure regualtor, etc.
If you’re not planning on doing this yourself, just bring your car to a reputable shop and tell them your symptoms. Let them figure it out