P0300 with no engine light

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mjcanham18

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Just bought a 2004 Yukon with 134,000 miles on it. Failed inspection due to P0300 random misfire but there is no other corresponding code or light on the dash. Where do I go from here?

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hectorotani

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Inspect all connections and rescan. Or take it to a good mech....,and ute lucky to have such low miles..

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mjcanham18

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Inspect all connections and rescan. Or take it to a good mech....,and ute lucky to have such low miles..

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Thanks already tried resetting and it came back once again with no engine light. Have yet to inspect connections though.

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hectorotani

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U may need an electronic mech to have him diagnose individual components,

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swathdiver

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Just bought a 2004 Yukon with 134,000 miles on it. Failed inspection due to P0300 random misfire but there is no other corresponding code or light on the dash. Where do I go from here?

If you like this truck and plan to keep it, get a Tech2 so you can work on it. Within minutes you'll know why it's misfiring without throwing parts at it. Maybe someone on here has one that lives nearby, you never know?
 

bottomline2000

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Just bought a 2004 Yukon with 134,000 miles on it. Failed inspection due to P0300 random misfire but there is no other corresponding code or light on the dash. Where do I go from here?

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Does your engine light turn on when you cycle the key? May be as simple as someone took the bulb out or it's blown..

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