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1992 5.0 EECIV codes

2K views 9 replies 4 participants last post by  lx92coupe 
#1 ·
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
 
#9 ·
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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