P1404 Code: Exhaust Gas Recirculation (EGR) Closed Position Performance
🟠 Moderate severity · drivable
You can usually keep driving, but a stuck-open EGR valve can cause rough idle and stalling, so get it checked soon.
What P1404 means
The engine computer detected that the exhaust gas recirculation (EGR) valve did not return to its fully closed position when commanded. The valve's position signal did not match what the computer expected, so it stored P1404. On some vehicles this code can also point to an intake air temperature sensor circuit fault.
Symptoms
- Check engine light is on
- Rough idle or stalling
- Reduced fuel economy
- Hesitation on acceleration
Common causes
- most common: Carbon buildup on the EGR valve keeping it from closing
- common: Sticking or faulty EGR valve
- common: Faulty EGR position sensor
- less common: Clogged EGR passages
- less common: Wiring or connector issue in the EGR circuit
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Clean the EGR valve and passages | Yes | $20–100 |
| Replace the EGR valve | Mechanic | $150–450 |
| Test and replace the EGR position sensor | Yes | $40–120 |
Frequently asked questions
Can I drive with a P1404 code?
Yes, usually short-term. The engine will run, but a stuck EGR valve can cause rough idle or stalling, so have it diagnosed soon.
Will cleaning the EGR valve fix a P1404?
Often yes. Carbon buildup is the most common cause, so cleaning the valve and passages is a good first step before replacing parts.
How much does it cost to fix a P1404?
Most repairs run $20–$450. Cleaning the valve costs the least, while replacing the EGR valve or sensor is more expensive.
Related codes
P0401
P0401 Code: Exhaust Gas Recirculation (EGR) Flow Insufficient Detected
P0404P0404 Code: Exhaust Gas Recirculation (EGR) Circuit Range/Performance
P0405P0405 Code: Exhaust Gas Recirculation (EGR) Position Sensor A Circuit Low
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.