As the title states. I have a 2001 Elantra. Ran fine until about a week ago. I was driving down the road when all of a sudden the engine just flat died. I thought it was the fuel pump so I had it towed home. After removing/inspecting the fuel pump I checked other stuff and noticed the injectors weren't firing even though it had fuel pressure. I checked the fuse box and the 10A "SNSR" fuse was blown. I cannot find in my Hanes manual what this fuse is, or anywhere else for that matter.

Anyway I replaced it and it ran fine for 3 more days. Then today on the way home, bam, same thing. I replaced the SNSR fuse again and as soon as I turned the key it blew the fuse again. Replaced it again, same thing. I had to have it towed home again.

Now I'm at a loss as to what this fuse goes to. I can't find it in my manual and this is becoming annoying.

Any help as to what this fuse goes to or suggestions about what the problem is would be GREATLY appreciated!

 

INJ. 15A Injectors, idle speed actuator, CMP, canister purge valve
SNSR 10A ECM, heated oxygen sensor
DRL 15A DRL control

F/FOG 15A Front fog lamp relay
HORN 10A Siren, TCM
A/CON 10A A/C relay, horn relay
H/LP(HI) 15A Head lamp relay (High)
H/LP(LO) 15A Head lamp relay (Low)

 

Thanks! Does that mean it could be the ECM or one of the oxygen sensors, or just the oxy sensor going thru the ECM?

 

Fuse is in the power circuit that drives the PCM and supply source voltage for the ox heaters... PCM duty cycle ground to heat the sensors...

Take and unplug the ox sensors, install fuse, turn key on, and see if fuse pops or stays closed.. if so, likely not the PCM.. plug in an ox, and see if fuse goes open, if so, you have short in heater/heater circuit

 

Turns out it was the #2 O2 sensor wire. It was hanging on the cv halfshaft and had rubbed through causing a straight short

Anyway gonna either find a new plug to replace the damaged one/wire or just solder it straight to the harness.

Thanks a ton for the help!