1997 - 2003 F-150

HEGO Sensor Fuse

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Old 04-27-2017, 10:27 AM
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HEGO Sensor Fuse

Got clutch changed on my truck then after everything was done and put back together drove a little then ac clutch on compressor isn't engaging, speed sensor went out or not reading, and code reader says intake manifold runner control stuck closed.
All the codes are P0340 P1519 P0443 P1451 P0722 P0720 P1460 P0135 P0141 P0155 P0161 P1409 P1131 P1151 P0171 P0174
It's a 2003 F150 V6 4.2L with M5OD (manual 5 speed with Over Drive transmission)
Looked at the fuse box under the hood and fuse 23 the HEGO Sensor fuse is blown I replaced it but it blown again. Any advice?
 
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Old 04-27-2017, 10:40 AM
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Take it back to whomever replaced the clutch and have them repair the wiring harness they damaged. Most likely, they either pinched it or they let it get on the hot exhaust manifold and it melted, shorting out the power feed to ground and blowing the fuse. If a 4x4, also check for wiring in contact with the front drive shafts.

Once the wiring is repaired and the fuse replaced, reset the PCM and you should be back in business. Everything you named off except probably those "lean" codes are dependent on fuse F23 including the A/C.
 
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Old 04-27-2017, 01:00 PM
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New problem

Went through 2 fuses and found out the O2 sensor has a short. But I have a new problem I put the last fuse in and it didn't blow but when I put it in I saw a spark at the end of the fuse box and now my pats is throwing 1:6 code on theft light and my code reader isn't picking up the ECU.
 
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Old 04-27-2017, 01:20 PM
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Spark came from here
Spark came from right here when I inserted the fuse.
 
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Old 04-27-2017, 01:55 PM
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The PCM is no longer getting power. That spark probably burned something out.

What was the amperage rating of the replacement fuse?
 
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Old 04-27-2017, 02:33 PM
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Had an 15 amp fuse originally it was blue and had a blue 25 amp fuse I accidentally put in there after I saw the spark I immediately took it out and looked at it to see the amps was wrong then I put the correct fuse in a 15 amp. I messed up by not checking the amp first on the fuse.
 

Last edited by Bonebuster; 04-27-2017 at 02:36 PM.
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Old 04-27-2017, 02:59 PM
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Yeah, that 25A fused probably let the magic smoke out of the wires that feed the PCM.
 
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Old 04-27-2017, 03:20 PM
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Got it running again started pulling all the fuses out and checking them and was a 30 amp fuse blown out. But after I got running again the HEGO Sensor fuse blow again. The guy that worked on my clutch just moved out of state so I can't reach him.
 
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Old 04-27-2017, 03:54 PM
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What are the possible connections that could cause the HEGO Sensor fuse to blow?
 
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Old 04-27-2017, 04:02 PM
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Also when clutch was changed the fluid was also changed out. Used this kind. Could that cause the problems I'm having?
 
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Old 04-27-2017, 04:11 PM
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You mean that was used in the transmission? If so, that's correct, the M5OD takes ATF. The clutch hydraulic system takes brake fluid.

Has absolutely nothing to do with your issues.
 
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Old 04-27-2017, 04:29 PM
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Go back and re-read post #2.
 
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Old 04-27-2017, 04:30 PM
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Ok that's a relief. What wires should I check for a short or what process should I do to see what's causing the fuse to blow?
 
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Old 04-27-2017, 07:36 PM
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Go under there and actually LOOK at the wires, for starters. Don't post back until you've at least done that.
 




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