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Whats a code 34 on a 89 Isuzu trooper?

Updated: 12/12/2022
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15y ago

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Code 34 is MAP/EGR code. Take your EGR valve off and clean it VERY WELL with carb cleaner. Take battery cable off for 5min and depress brake pedal to kill power to the system. If the light comes back on within a few miles, then you need a new MAP sensor which is about $40.

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15y ago
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Q: Whats a code 34 on a 89 Isuzu trooper?
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