DTC 1450

Reply Subscribe

Thread Tools

Search this Thread

Aug 12, 2011 | 08:08 AM

Moto Mel

Thread Starter

Postmaster

Joined: Jan 2009

Posts: 4,584

Likes: 3

From: Chesapeake, Va.

DTC 1450

DTC 1450

My Navigator has been showing this DTC for just a little while and thanks to 2 members I found the problem and am in the process of repairing the wiring that is damaged now.
It seems that those cute little squirrels that are eveywhere in my area were so hungry they ate the wires right from the main harness to the plug causing the code. Once I have completed the repair, today, I will coat the wires with a liberal amount of Tobasco sauce as I have found that the squirrels do not like it at all. I coated the spark plug wires on our cars after we had to replace them because of these pests and now I'll get under all of our vehicles and do the harness' and wires.
I suggest that others that have a lot of squirrels in their neighborhood do the same. It's easier than having to replace/repair the wires.
I'll post some pics in a follow-up post.
<HR align=center color=#d1d1e1 SIZE=1 width="100%" noShade>
I suppose that excessive vacuum in the fuel tank could cause a lean condition by restricting fuel flow just as a clogged fuel filter can sometimes cause a lean condition. The first thing I would do is determine if you have a canister purge solenoid, a vapor management valve or a canister vent solenoid. The following is from the 1998 Ford OBD System Operation Summary and applies to the enhanced evaporative system:

"The evap system integrity test is done under conditions that minimize vapor generation and fuel tank pressure
changes due to fuel slosh since these could result in false MIL illumination. The check is run after a 8 hour cold
engine soak (engine-off timer), during steady highway speeds at ambient air temperatures (inferred by IAT)
between 40 and 100 oF.
The evap system integrity test is done in four phases.
(Phase 0 - initial vacuum pulldown):
First, the Canister Vent Solenoid is closed to seal the entire evap system, then the VMV is opened to pull a 7”
H2O vacuum. If the initial vacuum could not be achieved, a large system leak is indicated (P0455). This could be
caused by a fuel cap that was not installed properly, a large hole, an overfilled fuel tank, disconnected/kinked
vapor lines, a Canister Vent Solenoid that is stuck open or a VMV that is stuck closed.
If the initial vacuum is excessive, a vacuum malfunction is indicated (P1450). This could be caused by kinked
vapor lines or a stuck open VMV. If a P0455 or P1450 code is generated, the evap test does not continue with
subsequent phases of the small leak check, phases 1-4."

I would only consider the CVS as a possible lean condition cause if you have DTC P1450<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com

ffice

ffice" /><o

></o

>
<o

> </o

>
<o

> </o

>
lgeiger13 from the previous post was right on !.

I had a check engine light appear on my 2000 Ford Ranger (142K miles). Disconnecting the battery did not clear it. Both Autozone and Midas read the code (P1451) and said it was the Gas Cap. Went to the Ford garage to get an original ($25) but the code did not clear. Did some searching on the net and ran across the lgeiger13 post. Slid under the truck and just in from of the spare tire is the canister and on the front top side of that is the solenoid. Traced the wires back a few inches across the top of the canister and it was immediately obvious they were damaged. Apparently these wires rub on the bracket for the canister and it had worn through the protective tubing and broken the wires in serveral places. Poor design. Used a few inches of wire, solder, some heat shrink tubing, electrical tape, and "split loom tubing (3/8 inch I think). That did the trick. I also re-routed the wires away from the bracket. My guess is just about every Ranger will have this problom eventually.

Thanks for the post lgeiger13.

Thanks from Moto Mel also...

Aug 12, 2011 | 12:12 PM

Moto Mel

Thread Starter

Postmaster

Joined: Jan 2009

Posts: 4,584

Likes: 3

From: Chesapeake, Va.

The original post quoted was from several years ago and the info was provided by LXMan and ProjectSHO who made a great call on the problem and that led to my being able to quicly find and repair my problem.
Those cute pesky squirrels ate a bunch of the wires and tape but, they will get a surprize when they go back for more as all the wires under the Navigator are liberally coated with Tobasco sauce.

Here's some pics as I promised and I hope this helps the next guy.

Pic 1 is what I found when I went under there this morning.
Pic 2 is the old and the replacement wire that I used from the Expedition I'm parting out.
Pic 3 is the job as finished.