P0490 Code - Exhaust Gas Recirculation Motor Control Circuit High Voltage
Quick Answer
The Engine Control Module (ECM) supplies the Exhaust Gas Recirculation (EGR) valve with a 5 V reference circuit, a low reference circuit, an H-bridge motor directional control circuit, and a signal circuit. Common causes include Faulty Exhaust Gas Recirculation (EGR) Valve, Exhaust Gas Recirculation Valve harness is open or shorted, Exhaust Gas Recirculation Valve circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0490 indicates Exhaust Gas Recirculation Motor Control Circuit High Voltage.
- Common causes
- Common causes include Faulty Exhaust Gas Recirculation (EGR) Valve, Exhaust Gas Recirculation Valve harness is open or shorted, Exhaust Gas Recirculation Valve circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0490 Description
What are the Possible Causes of the DTC P0490?
- Faulty Exhaust Gas Recirculation (EGR) Valve
- Exhaust Gas Recirculation Valve harness is open or shorted
- Exhaust Gas Recirculation Valve circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0490?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0490 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P0490 Audi — Exhaust Gas Recirculation Throttle Control Circuit 'A' Circuit High
- P0490 Buick — Exhaust Gas Recirculation Motor Control Circuit High Voltage
- P0490 Cadillac — Exhaust Gas Recirculation Motor Control Circuit High Voltage
- P0490 Chevrolet — Exhaust Gas Recirculation Motor Control Circuit High Voltage
- P0490 Chrysler — Exhaust Gas Recirculation Throttle Control Circuit 'A' Circuit High
- P0490 Dodge — Exhaust Gas Recirculation Throttle Control Circuit 'A' Circuit High
- P0490 Ford — Exhaust Gas Recirculation Motor Control Circuit High Voltage
- P0490 GMC — Exhaust Gas Recirculation Motor Control Circuit High Voltage
- P0490 Jeep — Exhaust Gas Recirculation Throttle Control Circuit 'A' Circuit High
- P0490 KIA — Exhaust Gas Recirculation Throttle Control Circuit 'A' Circuit High
- P0490 Lincoln — Exhaust Gas Recirculation Motor Control Circuit High Voltage
- P0490 Mercury — Exhaust Gas Recirculation Motor Control Circuit High Voltage
- P0490 Mitsubishi — Exhaust Gas Recirculation Throttle Control Circuit 'A' Circuit High
- P0490 Volkswagen — Exhaust Gas Recirculation Throttle Control Circuit 'A' Circuit High
Frequently Asked Questions about P0490 Code
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