Why do i keep getting a Po300 engine code only at idle

Asked by Guru9CNWGN Aug 08, 2023 at 10:26 AM about the 2013 Chevrolet Express Cargo 1500 RWD

Question type: Maintenance & Repair

Why do I keep getting a po300 engine code at
idle

1 Answer
307,255

Gene answered 8 months ago

P0300 multiple misfire. Many things can cause this, vacuum leaks, bad spark plugs, plug wires, plugged injectors, thermostat, ECT sensor, fuel pump flow and pressure. The list keeps going.

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