DMTL - Help

DiscoRover

Active member
Jul 19, 2004
26
0
60
Katy, TX
www.houstonlandroverclub.com
I searched old threads but would like some additional information if anyone can help:

2003 Discovery, 88K miles. MIL code 1451 DMTL . Cleared code with T4 , code returned within 2-3 min of running. Code shows present and consistent. I can not find any reference to the DMTL in the shop manual. Can anyone tell me what could be causing this code, where in the emissions system it is located and what it looks like? I have access to a parts vehicle if I can id what needs to be changed out. FYI - this vehicle is equiped with secondary air if that makes a difference.

Thanks for the help.
Jeff
 

crown14

Well-known member
May 11, 2006
6,288
4
Clayton, NC
ahh the good old bosch (they call it DTML)

It pertains to the evap system. Youll hear a lot of people tell you to tighten the gas cap, or replace it and while those are good suggestions, dont be surprised if that does not fix the problem. Its been a few months since I dealt with this but most likely you need a new purge solenoid. The real way to tell involves smoke testing the lines to from the engine bay to the rear of the truck.

The solenoid has two plastic lines connected to it, and one electrical plug and is located on the side of the upper plenum just rearward of the throttle body.
 

DiscoRover

Active member
Jul 19, 2004
26
0
60
Katy, TX
www.houstonlandroverclub.com
Thanks guys. I forgot to mention that I have had a problem with the gas cap not threading in properly. I replaced the fuel fill tube and cap with a used one before I cleared the codes in the hopes that was the problem. I will replace the purge valve this afternoon and update you on the status.

Thanks again.
Jeff
 

DiscoRover

Active member
Jul 19, 2004
26
0
60
Katy, TX
www.houstonlandroverclub.com
Well no joy. Replaced the purge valve, cleared the codes and MIL returned after the 2nd restart, same codes, 86 unknown and 1451 DMTL. Any suggestions on what to try next? Someone posted a picture of the fuel leak detection pump located on the right side frame rail, would that be the next step?

Jeff