Code 402 Popped Up

9mmMick

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Hi,
Got this reading yesterday after my engine light came on.
Mechanic cleared it and said if it comes back bring the
truck back in.
P0402 EGR Exhaust gas recirculation flow excessive detected EGR valve, sensor failure
Is it really a sensor failure, or could it be something else?
 

6.0 Tech

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Stock air filter? Some of the aftermarket filter setups will throw p0401 or p0402 codes due to qirflow over the maf being different than stock.
 

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