1992 5.0 EECIV codes - Mustang Evolution

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Old 04-09-2014, 07:43 PM   #1
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1992 5.0 EECIV codes

our 1992 5.0 is giving 41, 53, 91 codes koeo. It looks like o2 sensor problems and tps problem. I am having trouble finding a code list for 92 mustang eeciv that is not generic for other years.

some lists say 41 oxygen sensor problem, some show always lean passenger side

53 throttle position sensor out of range

91 drivers side o2 sensor

some lists show fuel pressure for 41 and 91

thanks
Steve
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Old 04-09-2014, 07:56 PM   #2
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Old 04-09-2014, 08:08 PM   #3
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Is it kind of odd that both 02 sensors could have failed at the same time. Or maybe is the tps causing the whole problem?
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Old 04-09-2014, 08:14 PM   #4
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Do u have a cat delete system?
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Old 04-09-2014, 08:31 PM   #5
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Off-road h for many years
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Old 04-09-2014, 08:48 PM   #6
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It also has 6 psi supercharger with fmu and stock injectors. It has had this setup for 12 plus yrs. it was parked for. 3 years and put back in service about a year ago
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Old 04-13-2014, 02:30 PM   #7
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I would fix the easiest first then redo codes. I had a tps voltage to low, and a right side o2 to lean or something. I fixed the tps voltage and they both went away.

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Old 04-13-2014, 03:10 PM   #8
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I have parts ordered. That is the plan.
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Old 04-13-2014, 07:14 PM   #9
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If you're getting both code 41 and 91 I would check a loose or faulty connection within the O2 harness terminals. Also For codes 41/91 (lean condition), it is always recommended to check the condition of the HEGO GND circuit (pin 49 at ECM connector), a bad/open ground circuit will cause lean readings from the O2 sensors. The HEGO GND is an Orange wire, with a ring connector, that goes bolted to the back of the driver side cylinder head.


Code 53... TPS Codes 23/53/63 Troubleshooting
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Old 05-12-2014, 07:42 PM   #10
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Update after a few weeks...... I only changed the tps and all is well with no codes.


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