P0619 — Starter Relay Circuit High
Seen on: Heavy Truck
Starter Relay Circuit High. Common causes: Starter relay circuit voltage high.
Your code rides along, so nearby mechanics see the fault before they quote you.
How serious is it?
Serious. Power derate likely — plan to stop soon.
Most likely causes
- Starter relay circuit voltage high
- Open in circuit
- failed relay
First moves (roadside)
- Check relay signal wire for open
- test relay
FAQ
Starter Relay Circuit High. Common causes: Starter relay circuit voltage high.
Serious — Power derate likely — plan to stop soon.
The most common cause is: Starter relay circuit voltage high. Other possibilities include Open in circuit; failed relay.
Power derate likely — plan to stop soon. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Find a mechanic or related guides
General diagnostic guidance for diesel engines (Cummins, Detroit, PACCAR, Volvo, Mack and more). Not a substitute for a scan-tool diagnosis on your specific truck.