[drz]

...running your car constantly on low or on Reserve.

notice that the pump is made up of a small motor that drives the pump; and the motor runs on (composite) plastic bearings. the bearings somehow rely on gasoline(fluid) for lubrication.

Deprive them of lubrication(the gasoline in your tank) and it's just a matter of time before the pump goes bad .

Excellent answer! Thanks once again, darkhorse.

 

[drz]

It may have just been a one-time occurrence. In that case, it is all good -- that is what you want your fuses there for in the first place.

Which fuse blew? This will help us give you some ideas as to why it went out.

 

[drz]

The only 20 A fuse in the E-box, fuse #3, protects the following circuits:

1. A/C compressor clutch relay
2. camshaft position sensors
3. crankshaft position sensor
4. DME main relay
5. fuel pump relay
6. leakage diagnosis pump (fuel tank)
7. mass air flow sensor
8. secondary air injection pump relay
9. thermostat

So it could be a fuel pump on its way out. I really don't think any of 1 - 4, 7, or 9 is to blame. You would have noticed something earlier. I don't know what 6 and 8 do, but guess they are suspects as well.

Did you notice anything strange that could be related to any of these systems before the fuse blew? Anything strange still going on? Is your CEL on, or has it come on recently?

 

[drz]

Hmmm. Is seems like we are on teh right track. Fuses don't generally just go bad. They aren't really wear and tear items. The best course of action is the one you are taking: diagnosing the problem that led to the fuse blowing.

I don't think the outside air temperature sensor has anything to do with the SES light In general the only thing it tends to affect is the reading on the OBC (at least that is how I know it to operate on earlier cars).

The codes you pulled seem to point to two of the issues listed in my last post:

- leakage diagnosis pump (fuel tank)
- secondary air injection pump relay

I don't know much about these systems.I'll check my Bentley manual to see what I can find out. Keep in mind that the fuel pump itself is still not exonerated.

I think that if you can check all three systems and they all check out fine then you should be okay. Maybe you had some sort of a surge at some point and that is why the fuse went out. If you find anything hat may need replacement/repair, then I think you will have found your culprit.