This is a short write-up on the Wait to start light flashing in a 5.9L common rail Cummins pickup.
On February 4th, 2012 Dodge/Chrysler released an update for the 5.9L common rail trucks that was designed to help diagnose an issue within the fuel system of the truck.
When you take the truck to a dealer or load a Smarty tuner, you will have the latest software for the truck which includes this.
You will see the wait to start light come on while driving as well as 10 chimes if the issue is present.
There are also 2 codes that can present themselves at times:
-P1222 Leak Detection During Motoring
-P1223 Leak Detection Based on Quantity Balance
Some possible causes for this issue as per Dodge's TSB 18-006-12:
OTHERS DTC’S PRESENT
FUEL CONTROL ACTUATOR
FUEL PRESSURE SENSOR
CASCADE OVERFLOW VALVE
CHECK VALVE DAMAGED OR BLOCKED
FUEL RETURN LINES OBSTRUCTION, DAMAGE, OR DEBRIS.
LIFT PUMP FLOW
AIR IN FUEL SYSTEM
LEAKING FUEL INJECTORS OR HIGH PRESSURE CONNECTORS
PRESSURE LIMITING VALVE
HIGH PRESSURE FUEL PUMP
We highly recommend you check this list, as the cause is often one of these.
To fix this you will need to track down where the possible leak/issue is. Oftentimes as injectors age they will be the cause of the problem. You also want to make sure that the injector feed tubes are set to the correct torque specifications. These two are some of the more common causes.
We do offer a file that will backdate the Dodge software to before they introduced the Wait to start light as a warning system, but doing so isn't recommended because it is putting a band-aid over the problem.
What is causing the light in the first place will still be present.
We can only provide this file for the following Smarty tuners: J-06, S-06, and SSR.