P1404
IAT - B Circuit Malfunction/ Exhaust Gas Recirculation Closed Position Performance
P1404 is an OBD-II diagnostic trouble code meaning: IAT - B Circuit Malfunction/ Exhaust Gas Recirculation Closed Position Performance. Common causes: intake air temperature (iat) sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $17–67.
Symptoms
- Check Engine Light Is On
- Deterioration in acceleration dynamics
- Increased fuel consumption
- Unstable engine operation at idle
- Increased emissions of harmful substances
Causes
- Intake air temperature (IAT) sensor malfunction
- Open or short circuit in the sensor circuit
- EGR valve stuck closed
- EGR solenoid valve malfunction
- Wiring Harness Problems
How to Fix
- Check the condition of the intake air temperature sensor
- Check the integrity of the wiring to the EGR sensor and valve
- Clean or replace EGR valve
- Check the operation of the EGR valve actuator
- Scan the system for other errors
Related codes
Error P1404 by Vehicle Brand
FAQ
What does the P1404 code mean?
P1404 is an OBD-II diagnostic trouble code that indicates: IAT - B Circuit Malfunction/ Exhaust Gas Recirculation Closed Position Performance
What causes a P1404 error code?
The most common causes of P1404 include: Intake air temperature (IAT) sensor malfunction; Open or short circuit in the sensor circuit; EGR valve stuck closed; EGR solenoid valve malfunction.
How do I fix a P1404 diagnostic trouble code?
To fix P1404: Check the condition of the intake air temperature sensor. Check the integrity of the wiring to the EGR sensor and valve. Clean or replace EGR valve. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1404?
Yes, but get it checked soon
How much does it cost to fix P1404?
The estimated repair cost for P1404 is $17–67. Actual cost depends on your vehicle, location, and labor rates.
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