Check the intake and exhaust manifolds around the EGR valve. There may be enough carbon buildup to prevent free flow of gasses.
my Honda passport is having a problem.troubleshooting of p0401.the gas recirculation(egr)flow insufficient aadetected.
Probably a clog in the EGR
The 2002 Honda Passport has a timing belt. This belt must be replaced every 100,000 miles. You should also replaced the water pump at the same time. Warning: This is an interference engine.
Trouble code P0401 means:Exhaust gas recirculation flow insufficient detected
Trouble code P1153 means: HO2S Insufficient Switching (Bank 2 Sensor 1)
Trouble code P0401 means:Exhaust gas recirculation flow insufficient detected
For my 2001 Honda Passport, I paid $420 to have the water pump and timing belt replaced in October 2008.
the honda passport scooter was a reliable scooter, given any small upkeep. The passport got even more reliable as the years went, because of new improved parts that could be added or replaced.
after the 2002 Honda passport which was manufactured by Isuzu was discontinued, Honda launched its first SUV that was actually manufactured by Honda and called it the pilot. the pilot suspension and chassis was based on the accord giving the SUV a smooth and car like ride oppose to the passport which was mounted on a Isuzu truck chassis.
It has a timing belt that must be replaced every 105,000 miles.
We replaced the fuse, and it went out.
Have your speed sensors replaced