What is the Wrench symbol warning light on F250 diesel 2006 model mean

What is your question?

This warning light came on when driving up hill while towing rv The ford manual said to contact Ford? After stopping truck and restarting the light went out?

What makes this problem better or worse?

Going uphill while pulling rv

How long has your 2006 Ford F-250 Super Duty had this problem?

Off and on when traveling with RV