P0403 on Volvo
Exhaust Gas Recirculation Circuit Malfunction
P0403 on Volvo vehicles indicates exhaust gas recirculation circuit malfunction. Au7o has documented this code across 2 Volvo models — most commonly on S90, XC60. 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 Volvo range from $300 to $4,500, 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 Volvo by Model
Volvo S90(1 issue)
- Sensus Infotainment System Lag, Crashes, and Black Screen2017-2023
The Sensus infotainment system in the S90 suffers from significant lag, screen freezes, and black screen episodes. Since the system controls climate, seat heating, navigation, and vehicle settings through the central touchscreen, a crash renders many vehicle functions inaccessible. The system runs on a Tegra K1 processor that struggles with the software load, especially when running multiple features simultaneously. Volvo has released numerous software updates, and the transition to Google-based Android Automotive OS in 2024 addressed the hardware limitations but introduced new software bugs.
Volvo XC60(2 issues)
- Aisin TF-80SC 8-Speed Transmission Shudder and Harsh Shifting2018-2022
The Aisin Warner TF-80SC 8-speed automatic transmission used in the XC60 T5 and T6 can develop shuddering during light acceleration at 30-50 mph and harsh 1-2 and 2-3 upshifts. The torque converter lockup clutch is the primary culprit, with fluid degradation accelerating the issue. The transmission control module (TCM) software has been updated multiple times by Volvo to address shift quality. Some units require torque converter replacement. The issue is more prevalent in vehicles driven primarily in stop-and-go traffic.
- Four-Corner Air Suspension Compressor and Strut Failure2018-2024
XC60 models equipped with the optional Four-C (Four-Corner) air suspension system can experience compressor failure and air strut leaks, typically after 60,000-80,000 miles. The air compressor works overtime to compensate for slow leaks in aging air struts, eventually burning out. Symptoms start with the vehicle sitting lower on one corner after sitting overnight and progress to complete suspension failure with the car sitting on the bump stops. Cold weather accelerates air spring rubber degradation. The system uses Continental air struts.
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View P0403 across all makes →Frequently Asked Questions
What does P0403 mean on Volvo?▼
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 Volvo specifically, this code is documented across 2 models.
What causes P0403 on Volvo vehicles?▼
Common causes on Volvo: 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 Volvo?▼
Repair costs on Volvo range from $300 to $4,500, depending on the specific model and root cause.
Which Volvo models have P0403 documented?▼
Au7o has documented P0403 on 2 Volvo models: S90, XC60.