P0619 — Starter Relay Circuit High
What it means: Starter Relay Circuit High.
How serious / can you keep driving: Serious. Power derate likely — plan to stop soon.
Check first: Check relay signal wire for open
Don't risk it — look up listed providers near you and give them this code when you call.
Listed providers nearest Indianapolis, IN
Closest first. Tell them P0619 and what the truck is doing. RoadService.app lists these providers and does not employ them or carry out the repair.
- 0.0 mi away — based in Indianapolis, IN · (317) 789-5002
- 0.0 mi away — based in Indianapolis, IN · (317) 300-7000
- 0.0 mi away — based in Indianapolis, IN · (317) 646-8208
Seen on: Heavy Truck
What P0619 means
Starter Relay Circuit High. Common causes: Starter relay circuit voltage high.
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.
Related codes
Codes that commonly appear alongside P0619, or share the same subsystem.
- ECU Power Supply — Intermittent / Erratic (SPN 627 FMI 2)
- Battery / Charging Voltage — Low (SPN 168 FMI 18)
- Engine Controller (ECM) — Internal Fault (SPN 629 FMI 12)
- Battery voltage low during crank (SPN 168 FMI 17)
- J1939 proprietary datalink lost (SPN 625 FMI 9)
- J1939 Data Link — Communication Error (SPN 639 FMI 2)
- High Speed CAN Bus Fault (U0001)
- Lost Communication with ECM/PCM (U0100)
Same symptom: Charging and voltage
Other codes that trace back to voltage — one bad ground can set half a dozen of them at once.
- System Voltage Malfunction (P0560) · Electrical, Charging & Network
- System Voltage Low (P0562) · Electrical, Charging & Network
- System Voltage High (P0563) · Electrical, Charging & Network
- Generator Control Circuit (P0620) · Electrical, Charging & Network
- Generator Field F Terminal Circuit (P0622) · Electrical, Charging & Network
- Generator Field Terminal Circuit Low (P0625) · Electrical, Charging & Network
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.