Mazda 3 2.3L Engine Code P2004 - Hard Starting on Cold Starts After Multiple Attempts
My 2006 Mazda 3 with a 2.3L engine is showing fault code P2004. The issue occurs only during cold starts—after three to four failed attempts, the engine eventually starts properly and runs normally. I'm looking for advice on what could be causing this and how to resolve it.
Fault code P2004 indicates an intake manifold runner control stuck open (Bank 1). This can cause difficulty starting, especially in cold conditions. Try applying penetrating oil or WD-40 to the affected components to help free up any stuck parts and restore proper operation.