P0403 on Ford
Exhaust Gas Recirculation Circuit Malfunction
P0403 on Ford vehicles indicates exhaust gas recirculation circuit malfunction. Au7o has documented this code across 4 Ford models — most commonly on Explorer, F-150, F-250 Super Duty. This emissions code indicates a malfunction in the exhaust gas recirculation (EGR) control circuit. The EGR system routes a small amount of exhaust back into the intake to lower combustion temperatures and reduce nitrogen-oxide emissions, and the computer commands the EGR valve open and closed through this circuit. The code sets when the electrical control signal to the EGR valve or its solenoid is out of the expected range — for example, an open, short, or a commanded change that doesn't produce the right feedback. It generally points to an electrical or wiring problem in the EGR control circuit, or the EGR valve/solenoid itself, rather than carbon clogging alone. Typical repair costs on Ford range from $300 to $3,500, depending on the specific model and root cause.
Common Causes of P0403
- •Faulty EGR valve or EGR solenoid
- •Damaged wiring or connector in the EGR control circuit
- •Open or short in the EGR control wiring
- •Corroded or loose EGR connector
- •Blown fuse or lost power supply to the EGR circuit
- •Carbon buildup binding the EGR valve
- •Faulty engine control module or driver circuit
P0403 on Ford by Model
Ford Explorer(1 issue)
- 360-Degree / Rearview Camera System Failure2020-2024
A software failure in the 360-degree camera system's image processing module can cause the rearview camera to display a blank/black image when the vehicle is placed in reverse, or the image may remain frozen on the display after the backing event has ended. This affects driver visibility and increases the risk of backing collisions.
Ford F-150(1 issue)
- Driveshaft Carrier Bearing Failure2015-2020
The two-piece driveshaft uses a center support (carrier) bearing that can wear out, causing vibration and noise. The rubber support degrades over time, especially in hot climates or with heavy towing. Ford TSB addresses this issue.
Ford F-250 Super Duty(1 issue)
- 6.7L Power Stroke EGR Cooler Clogging and Failure2011-2019
The EGR (Exhaust Gas Recirculation) cooler on 2011-2019 6.7L Power Stroke diesel engines is prone to clogging with soot and eventually failing, particularly on trucks used for highway driving, light loads, or trucks that idle extensively. The EGR cooler recirculates cooled exhaust gas back into the intake to reduce NOx emissions. Over time, soot accumulates in the cooler's internal passages until coolant flow is restricted, causing the cooler to overheat and fail. When it fails, exhaust gases enter the coolant system, causing overheating and "puking" coolant from the degas bottle. The 2011-2014 models are particularly susceptible due to narrow internal coolant passages. Ford issued TSBs for 2011-2014 trucks covering EGR cooler cleaning/replacement under extended warranty up to 120,000 miles. The EGR cooler for 2011-2016 is OEM part BC3Z-9V425-A; 2017+ is HC3Z-9V425.
Ford Maverick(1 issue)
- 12V Battery Drain and Loss of Drive Power - Recall 24S24 + SSM 530872022-2024
Ford Maverick trucks from 2022-2024 are affected by multiple 12V battery-related issues. Ford Safety Recall 24S24 (NHTSA 24V267) covers the BCM/PCM software inability to detect declining 12V battery performance, leading to Auto Start-Stop failures and vehicle stalling at low speeds. Additionally, Ford issued SSM (Special Service Message) 53087 for select 2022-2024 Maverick hybrids where the 12V battery drains intermittently when the ignition is turned off. MaverickTruckClub.com documents owners receiving "Remote Access disabled to reserve battery" FordPass alerts, with some needing 3+ battery replacements in 2-3 years. The hybrid system's complex 12V management appears to be the root cause of accelerated battery degradation.
Looking for P0403 on a different make?
View P0403 across all makes →Frequently Asked Questions
What does P0403 mean on Ford?▼
P0403 stands for "Exhaust Gas Recirculation Circuit Malfunction." This emissions code indicates a malfunction in the exhaust gas recirculation (EGR) control circuit. The EGR system routes a small amount of exhaust back into the intake to lower combustion temperatures and reduce nitrogen-oxide emissions, and the computer commands the EGR valve open and closed through this circuit. The code sets when the electrical control signal to the EGR valve or its solenoid is out of the expected range — for example, an open, short, or a commanded change that doesn't produce the right feedback. It generally points to an electrical or wiring problem in the EGR control circuit, or the EGR valve/solenoid itself, rather than carbon clogging alone. On Ford specifically, this code is documented across 4 models.
What causes P0403 on Ford vehicles?▼
Common causes on Ford: Faulty EGR valve or EGR solenoid, Damaged wiring or connector in the EGR control circuit, Open or short in the EGR control wiring, Corroded or loose EGR connector, Blown fuse or lost power supply to the EGR circuit. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0403 on a Ford?▼
Repair costs on Ford range from $300 to $3,500, depending on the specific model and root cause.
Which Ford models have P0403 documented?▼
Au7o has documented P0403 on 4 Ford models: Explorer, F-150, F-250 Super Duty, Maverick.