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2012 Isuzu NRR mystery exhaust system problem
Posted to HD/Fleet Forum on 10/12/2020 6 Replies

Almost 200k miles on this vehicle and it's had several issues that we've repaired. The issue now is that the exhaust system warning is on and there are no Isuzu fault codes (scanning with Autel Maxisys). If we scan faults with an OBD II scanner there are "perm... Login to read more.

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