PO 1746 showing on code reader after I kicked down and accelerated through gears.

Red gear light illuminated on dash.

Car continues to run fine in both auto and J Gate modes.

Can't reset with standard code reader.

Comments would be appreciated.

 

Have you gone through any water lately?


1746 is a pressure valve problem that would likely show as a quirky gear change, but if the trans is shifting properly and not hanging up in any gear, I'd suspect a wet TCM as the most likely culprit.

 

Thanks for the reply and sorry for belated response.
No water issues. This happened when I kicked it down to overtake and red gear light came on and stayed on. When I start car light does not appear until I shift into gear.
Car seems to run normally but worried that I am doing damage to tranny.

 

How many miles on your car, and have you ever serviced the trans fluid?

 

Thank you for your interest.
There is 271000 kilometres on the vehicle and still runs sweet.
Transmission has been serviced regularly.
I am going to replace the high pressure solenoid indicated as at fault and flush and replace fluid as an interim step before going further. Wish me luck!

 

Here is a portion of the DTC guide that you can find in the large file download area. (I uploaded it there!!)

P1746

Reduction Timing Solenoid
The reduction timing solenoid is one of 6 on/off solenoids, these being the shift solenoids A, B, C, low clutch solenoid, reduction timing solenoid and the 2-4 brake timing solenoid.

The on/off solenoids close the pressure circuit in response to current flow. Each solenoid has an internal coil. Current passes through coil and actuates the needle valve. The needle valve then opens and closes the fluid pressure circuits.

The solenoid is monitored by comparing the commanded to the actual condition of the solenoid. If the solenoid does not react to an on command on more than three occasions then a failure is registered.

The state of the solenoid is checked by analyzing the voltage on the drive circuit at the time the solenoid engages. If the failure is detected on two consecutive drive cycles, the DTC is logged.

Note: Unless specifically included in the tables below, IAT, ECT, vehicle speed and time after start up are not critical to enable these monitors.


There are 9 solenoids/valves that control the gearbox. They are explained in the guide.

bob

 

A thousand thanks motorcarman.
Lots of homework for me.
I will keep you posted on my endeavors.

 

Have you had experience with water previously?

 

at last i got a valid mot pass
tried 3 times to get it booked in , managed it to day 8.30 am passed it at 4.pm.it only wanted the handbrake taking up and a small brake pipe at the front.he took 20 pounds off the bill as inconvenience money

 

i think iv found a cure for the CD exchange error message when u have a fault on screen,
my friend has bought a 2003 x type and this message was on screen we took the ex changer out and swapped the fiber cable that plugs into car and unit, as i had a few of these . and hey presto it works, has anybody else tried this