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C0050 — ABS Pump Motor Relay Circuit
SeriousABSPower derate likely — plan to stop soon
Seen on: Heavy Truck
ABS Pump Motor Relay Circuit. Common causes: ABS pump motor relay fault.
Don't risk it — get a diesel tech on the truck.
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
- ABS pump motor relay fault
- Failed relay
- wiring fault
First moves (roadside)
- Test ABS relay coil and contacts
- check relay supply voltage
FAQ
What does C0050 mean?
ABS Pump Motor Relay Circuit. Common causes: ABS pump motor relay fault.
How serious is C0050?
Serious — Power derate likely — plan to stop soon.
What's the most likely cause of C0050?
The most common cause is: ABS pump motor relay fault. Other possibilities include Failed relay; wiring fault.
Can I keep driving with C0050?
Power derate likely — plan to stop soon. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Throwing this code right now?
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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.