Just had my 03 ?Hemi 1500 4x4 auto undersealed two days ago.
They sprayed a lot of water all over the truck underneath at high pressure to blast away any rust then coated everything with a product we have over here in the UK called Waxoyl. They said they were careful in "sensitive areas"???
I've just started to get the above error code today with the amber check engine light.
P1687 driver 5 line 7 error.

Help.........Anyone know what the heck that means???

Al

 

Scratch this post.
I found the culprit.
It was my new toy my Innovate OT2.
When I interogated the ECU in my truck asking if it had any codes even though no light/codes were displayed on my dash......this error flagged up.
Removed my OT2 and cold reset my PCM.....now Golden.

Moral of the story........to nosey about what my trucks doing........too many toys ha ha ha.......too much free time lmao!!
Al.

 

P1687- No Cluster Bus Message.

It happens when the PCM hasn't received a signal in 20 seconds.

 

I wonder if that's because the OT2 is interogating it??
Oh and BTW.....thanks for answering my post.....appreciated.
Al.