PowertrainP0490
CautionSeverity: Caution - get it checked when you can
EGR A Control Circuit High
Key terms: Catalytic converter: cleans the exhaust gases · EGR: exhaust gas recirculation, which cuts harmful gases · EVAP: the system that traps fuel vapour · Oxygen sensor: measures oxygen in the exhaust gas · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions
1What it means in plain English
This range covers emissions control (EGR, EVAP, oxygen sensors and the catalytic converter), but some manufacturers also use P04 codes for oil-pressure, brake-fluid and coolant-level warnings.
2Common causes
- Clogged or faulty EGR valve
- EVAP system leak (hoses, canister, fuel cap)
- Faulty oxygen sensor
- Ageing catalytic converter
- Low oil, brake fluid or coolant (on some models)
- Wiring or connector fault
3Can I drive?
Do not assume this code is safe to drive. Check the description: if it names oil pressure, brake fluid, coolant, or a brake fault, stop safely and have it diagnosed before driving. Emissions-only codes (EGR, EVAP, catalyst) should still be checked before an emissions or roadworthiness inspection.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 34
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P0490 | EGR A Control Circuit High SAE | Powertrain |
| BAIC Motor | P0490 | Start relay control circuit fault Brand | Powertrain |
| BYD | P0490 | EGR valve drive circ. Voltage too high Brand | Powertrain |
| Chery | P0490 | EGR Valve Drive Circuit Voltage Too High Brand | Powertrain |
| Chrysler | P0490 | EGR A Control Circuit High SAE | Powertrain |
| Daewoo | P0490 | Exhaust Gas Recirculation Control Circuit A High Brand | Powertrain |
| DFFS | P0490 | Exhaust Gas Recirculation Control Circuit A High Brand | Powertrain |
| DFFX | P0490 | Exhaust Gas Recirculation Control Circuit A High Brand | Powertrain |
| DFXK | P0490 | EGR Valve Drive Circuit Voltage Too High Brand | Powertrain |
| EOBD | P0490 | EGR 'A'-styrkrets hög Brand | Powertrain |
| Ford | P0490 | DTC P0404 is replaced by DTCs P0489 and Brand | Powertrain |
| Geely | P0490 | EGR valve drive Circ. voltage too high Brand | Powertrain |
| GM | P0490 | Exhaust Gas Recirculation Control Circuit A High Brand | Powertrain |
| Great Wall | P0490 | Exhaust Gas Recirculation Control Circuit A High Brand | Powertrain |
| Hafei | P0490 | Exhaust Gas Recirculation Control Circuit A High Brand | Powertrain |
| Holden | P0490 | Exhaust Gas Recirculation (EGR) Control Circuit Brand | Powertrain |
| Honda | P0490 | EGR A Control Circuit High SAE | Powertrain |
| Hyundai | P0490 | EGR A Control Circuit High SAE | Powertrain |
| Isuzu | P0490 | EGR A Control Circuit High SAE | Powertrain |
| Land Rover | P0490 | Exhaust Gas Recirculation (EGR) actuator short circuit to battery positive Brand | Powertrain |
| Mahindra | P0490 | EGR A Control Circuit High SAE | Powertrain |
| Maserati | P0490 | Exhaust Gas Recirculation Control Circuit High Brand | Powertrain |
| Mazda | P0490 | DTC P0404 is replaced by DTCs P0489 and Brand | Powertrain |
| Mitsubishi | P0490 | EGR valve high Brand | Powertrain |
| Nissan | P0490 | EGR A Control Circuit High SAE | Powertrain |
| Opel | P0490 | Exhaust Gas Recirculation Control Circuit A High Brand | Powertrain |
| Peugeot | P0490 | EGR A Control Circuit High SAE | Powertrain |
| Proton | P0490 | EGR valve high Brand | Powertrain |
| Saab | P0490 | Exhaust Gas Recirculation Control Circuit A High Brand | Powertrain |
| MG (SAIC) | P0490 | Exhaust Gas Recirculation Control Circuit A High Brand | Powertrain |
| Suzuki | P0490 | Exhaust Gas Recirculation Control Circuit 'A' High Brand | Powertrain |
| SWM Motor | P0490 | Exhaust gas recirculation (EGR) valve drive circuit short circuit to power supply Brand | Powertrain |
| Tata | P0490 | EGR Solenoid Valve Control - SC+ Brand | Powertrain |
| Toyota | P0490 | Exhaust gas recirculation (EGR) valve control circuit short to power supply Brand | Powertrain |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 2
These 7-character codes are manufacturer-specific variants of P0490 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Hyundai | P049000 | is set when excessive current is detected in Electric EGR control valve circuit for more than 0.65 sec. This code is due to short to battery in Electric EGR control valve control circuit or internal short in Electric EGR control valve component Brand | Powertrain |
| SsangYong | P049000 | High pressure Exhaust Gas Recirculation (EGR) valve H-bridge circuit short to battery (+) Brand | Powertrain |
6Related codes
Browse Pxxx codes or P049xx codes.