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P0400 OBD-II Trouble Code: Exhaust Gas Recirculation Flow Malfunction
P0400 code definition Exhaust Gas Recirculation Flow Malfunction What the P0400 code means P0400 is an OBD-II generic code that the engine control module (ECM) detected the engine exhaust gas recirculation...

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Check Engine Light coming on after repair to fix it
Some of these vacuum-operated EGR systems that your vehicle has can be a little tricky. There are a few different solenoids, and they can be hard to isolate and test to find the bad component. In addition to the solenoids,...

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