P2077 — EGR Control Circuit Range
What it means: EGR Control Circuit Range.
How serious / can you keep driving: Caution. Limp to the next safe stop.
Check first: Monitor EGR valve position in scanner
Don't risk it — look up listed providers near you and give them this code when you call.
Listed providers nearest Sparks, NV
Closest first. Tell them P2077 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 Sparks, NV · (775) 355-6884
- 0.0 mi away — based in Sparks, NV · (775) 356-7200
- 0.0 mi away — based in Sparks, NV · (775) 359-0550
Seen on: Heavy Truck/Diesel
What P2077 means
EGR Control Circuit Range. Common causes: EGR control circuit out of range.
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
EGR Control Circuit Range. Common causes: EGR control circuit out of range.
Caution — Limp to the next safe stop.
The most common cause is: EGR control circuit out of range. Other possibilities include Stuck EGR valve; position sensor fault.
Limp to the next safe stop. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Related codes
Codes that commonly appear alongside P2077, or share the same subsystem.
- SCR Operator Inducement — Severe Derate Active (SPN 5246 FMI 0)
- Aftertreatment 1 Diesel Particulate Filter Differential Pressure - Data Valid But Above Normal Operating Range, Most Severe Level (DPF severely restricted / plugged) (SPN 3251 FMI 0)
- Aftertreatment 1 Diesel Exhaust Fluid Quality - Data Valid But Below Normal Operating Range, Most Severe Level (DEF quality/concentration incorrect) (SPN 4364 FMI 1)
- DPF Differential Pressure — Data Erratic (SPN 3251 FMI 2)
- DEF Dosing Unit — Not Responding Properly (SPN 3361 FMI 7)
- SCR Conversion Efficiency — Below Threshold (SPN 4364 FMI 18)
- DEF Quality — Out of Spec (SPN 4094 FMI 31)
- EGR Temperature — Too High (SPN 412 FMI 0)
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.