Ford V10 OBD code

MitchF150 wrote:
It's a vacuum leak! It's not any sensor.

While I agree it is most likely NOT a sensor, I do not agree that is is 100% a vacuum leak. The vacuum leak would have to be coming from the intake manifold on the same side as the Lean code.. Otherwise most likely would get lean codes for BOTH banks.

Most of the vacuum ports are located directly under or at the throttle body so most likely a vacuum line leak would affect both banks. Although it is not unheard of having a crack in the intake manifold..

More likely the exhaust manifold gasket or cracked exhaust manifold on the affected bank which is quite common on these engines..

Just had this same issue with a 2006 5.4.. Quite a job to change, generally pretty good chance multiple manifold studs will break off in the process.

We were quoted $800+ for one side, decide truck was not worth dumping that kind of money into, bed rails were rusted out, had to fix the front one just so bed was not laying on the frame.. Cab corners were showing signs of rust from inside, doors were nearly rusted through.. The lean code basically made it a easy choice to buy a 2020 and be done with the money pit..

Personally, even though for its time the V10 was a good engine, I personally feel it IS a money pit if it is in a pickup truck to continue to dump gobs of money at it. If you are DIYing the repair, you can easily end up going down a rabbit hole at a lower cost but it is a diminishing return on your money on very old outdated engine and transmission technology.. Not to mention working on these engines with the cramped engine compartment makes repairs take much longer to complete repairs..

The 2020 6.2 can and will easily replace a 2001 V10 in pretty much all cases and do it with a little better fuel economy..

If OPs V10 is in a MotorHome, well that is an issue that they will need to fix unless they wanted to replace the MH..