Check engine/Codes
#1
Check engine/Codes
42HEGO HO2s Sensor voltage high/ system rich
33 EGR fault not closing properly
My check engine came on today and i got the system okay on KOEO but i ran a KOER and got 42 and 33 My egr valve has no vaccum going to it anymore so that could be it but i was really wondering what could be causing 42 the happen this is on a 89 F250 351 C6
33 EGR fault not closing properly
My check engine came on today and i got the system okay on KOEO but i ran a KOER and got 42 and 33 My egr valve has no vaccum going to it anymore so that could be it but i was really wondering what could be causing 42 the happen this is on a 89 F250 351 C6
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Next questions: Does your truck use oil? If it does the oil can contaminate the O2 sensor. Pull the vacuum hose off the fuel pressure regulator, check it for signs of a ruptured diaphragm by smelling the end of the hose.
How old are the plugs, wires, cap/rotor? Have you pulled the plugs and checked for signs of misfiring/fouling?
How old are the plugs, wires, cap/rotor? Have you pulled the plugs and checked for signs of misfiring/fouling?
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