P0404: Exhaust Gas Recirculation Circuit Range/Performance
85 vehicles · 18 makes
P0404 is an OBD-II diagnostic trouble code meaning “Exhaust Gas Recirculation Circuit Range/Performance.” The EGR valve position sensor is reading outside the expected range. The valve is not moving to the commanded position. This code appears across 85 vehicle models from 18 manufacturers.
Common Causes
Diagnostic Tools
To diagnose P0404, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (85)
FAQ
What does P0404 mean?
P0404 stands for "Exhaust Gas Recirculation Circuit Range/Performance." The EGR valve position sensor is reading outside the expected range. The valve is not moving to the commanded position.
What are the most common causes of P0404?
The most common causes of P0404 are: Carbon buildup preventing valve movement, Faulty EGR valve position sensor, Sticking EGR valve, Wiring issue, Failed EGR actuator motor. The specific cause varies by vehicle.
How much does it cost to fix P0404?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P0404?
Au7o has documented P0404 across 85 vehicle models from 18 manufacturers: Audi, BMW, Cadillac, Chrysler, Dodge, Ford, GMC, Honda, Hyundai, Jeep, Kia, Mazda, Nissan, RAM, Subaru, Toyota, Volkswagen, Volvo.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.