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2021 Check engine lite

Randystewart

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2021 ram 2500 diesel. 3500 miles. First cel at 2350 miles. Code was low def/contaminated def. cleared code. 2 cel 3000 mi. Same code. Cleared it Shop Forman said old stored code. 3 cel. 3200mi Same story. Old stored code. So apparently clearing code doesn’t remove code. His response was we are seeing a lot of codes over emission issues. Guess I’ll set up appointment with tech and see what they can figure out. Anyone else fighting these same problems?
 
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