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P2077 — EGR Control Circuit Range
CautionEGRLimp to the next safe stop
Seen on: Heavy Truck/Diesel
EGR Control Circuit Range. Common causes: EGR control circuit out of range.
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?
Caution. Limp to the next safe stop.
Most likely causes
- EGR control circuit out of range
- Stuck EGR valve
- position sensor fault
First moves (roadside)
- Monitor EGR valve position in scanner
- compare actual vs commanded
FAQ
What does P2077 mean?
EGR Control Circuit Range. Common causes: EGR control circuit out of range.
How serious is P2077?
Caution — Limp to the next safe stop.
What's the most likely cause of P2077?
The most common cause is: EGR control circuit out of range. Other possibilities include Stuck EGR valve; position sensor fault.
Can I keep driving with P2077?
Limp to the next safe stop. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Throwing this code right now?
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.