EFI fuse 2 keep blowing
07-29-20, 09:40 AM
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EFI fuse 2 keep blowing
My car is in limp mode and my VSC., Check engine, triangle light is on. Pulled the codes for driver side rear wheel speed sensor and MAF. Changed both and still lights. I tried the paperclip in OBD. but no difference. I changed the blown EFI 2 fuse and car cut off seconds later and blew that fuse. What is wrong? The codes say MAF and Oxygen sensors
07-29-20, 02:45 PM
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07-29-20, 02:58 PM
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EFI#2 fuse powers the MAF, oxygen sensors and evap solenoids. Could be a few other things. I would start by inspecting the oxygen sensor wiring. Did it get damaged from something on the road or maybe a leaky exhaust. Or maybe there is an internal short. I think the oxygen sensor plugs are in the vehicle (difficult to reach) If you unplug them and the EFI#2 does not blow, then you can start narrowing down each sensor. You can also measure the heater resistance of the oxygen sensors from EFI#2 fuse to the ECM for each sensor. If there is a dead short, you found the smoking gun. Next would be the solenoids of the evap system.
Techstream is not really helpful if you have are blowing fuses. I would solve that problem first. Then solve any remaining codes.
Techstream is not really helpful if you have are blowing fuses. I would solve that problem first. Then solve any remaining codes.
07-29-20, 03:00 PM
#6
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My car is in limp mode and my VSC., Check engine, triangle light is on. Pulled the codes for driver side rear wheel speed sensor and MAF. Changed both and still lights. I tried the paperclip in OBD. but no difference. I changed the blown EFI 2 fuse and car cut off seconds later and blew that fuse. What is wrong? The codes say MAF and Oxygen sensors
07-29-20, 03:44 PM
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EFI#2 fuse powers the MAF, oxygen sensors and evap solenoids. Could be a few other things. I would start by inspecting the oxygen sensor wiring. Did it get damaged from something on the road or maybe a leaky exhaust. Or maybe there is an internal short. I think the oxygen sensor plugs are in the vehicle (difficult to reach) If you unplug them and the EFI#2 does not blow, then you can start narrowing down each sensor. You can also measure the heater resistance of the oxygen sensors from EFI#2 fuse to the ECM for each sensor. If there is a dead short, you found the smoking gun. Next would be the solenoids of the evap system.
Techstream is not really helpful if you have are blowing fuses. I would solve that problem first. Then solve any remaining codes.
Techstream is not really helpful if you have are blowing fuses. I would solve that problem first. Then solve any remaining codes.
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07-29-20, 05:35 PM
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I just put another fuse in box. I started car then it cut off. I checked the fuse and it was blown! I didn't even put car in drive. I noticed the VSC and triangle light was off until the fuse blew
07-30-20, 05:03 AM
#9
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Most likely one of wires downstream of the "EFI No.2" fuse is shorted to ground. Attached is the Engine Control wiring diagram. It's time to pull out the multimeter and locate the short.
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07-30-20, 05:24 AM
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07-30-20, 06:59 AM
#11
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My car is in limp mode and my VSC., Check engine, triangle light is on. Pulled the codes for driver side rear wheel speed sensor and MAF. Changed both and still lights. I tried the paperclip in OBD. but no difference. I changed the blown EFI 2 fuse and car cut off seconds later and blew that fuse. What is wrong? The codes say MAF and Oxygen sensors
Have you tested, inspected your Oxygen and MAF sensor, or tried a yard spare to see if fuse still blows?
07-30-20, 07:52 AM
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2001 I inspected the oxygen sensors underneath the car and the maf sensor and no wires or nothing detached or damaged the 2 oxygen sensor under the car wire goes into the car but I can't find the two that's under the engine hood if you can show me a picture of something it'll be fine
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