Some Nissan Maxima owners report experiencing issues such as a stuck open EGR valve, which can lead to increased combustion temperatures and potential engine damage, as well as risks to the catalytic converter. Additionally, some owners have reported problems with the bank 1 converter, which can negatively impact emissions and engine performance, often triggering error codes like P0420 due to efficiency falling below the threshold. Furthermore, there are reports of engines burning oil, which may indicate worn piston rings, valve seals, or gaskets, and can lead to oil leaks that require prompt attention to avoid further damage. It is essential for owners to address these concerns quickly to maintain optimal vehicle performance and prevent more significant issues in the future.

The Ford Explorer with the optional 5.0L/302ci V8 may develop misfires, rough running, and loss of power, accompanied by the check engine light illuminating. Ignition wires can rest on the exhaust manifolds if they are not properly secured. The hot manifolds will melt the insulation on the wires, damaging the wires and causing the mentioned condition. Replacement of the ignition wires, and securing them away from the exhaust manifold is necessary to remedy the rough running conditions.