P04FA
EGR A Control Temperature Too High
Generic OBD-II
Real-world scan data
Seen in
24
scans in the past year
Found in
<0.1%
of scans
<0.1%
of scans that found faults
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
Common symptoms
What you'll notice
- Replace or clean the EGR valve to ensure proper air flow and reduce temperature.
- Check the EGR coolant system for any leaks or blockages and repair or replace any faulty components.
- Inspect and clean the air intake system to ensure unrestricted air flow and cooler temperatures.
- Check for any exhaust leaks and repair or replace any damaged components to prevent excessive heat.
- If all else fails, consider reprogramming or updating the vehicle's engine control module (ECM) to optimize EGR operations and temperature control.
Common causes
Most likely first
- Faulty EGR valve
- Clogged EGR passage or tube
- Malfunctioning EGR control solenoid
- Exhaust gas leaks near the EGR system
- Engine coolant temperature sensor malfunction
How to diagnose & fix
Work through it in order
- Engine misfires or hesitation
- Decreased fuel efficiency
- Rough idle or stalling
- Check engine light illuminated
- Excessive exhaust emissions
Read & clear P04FA yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.