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EGR valve

P0490 Short circuit in the EGR valve wiring

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P0490 means: Short circuit in the EGR valve wiring. The engine computer can't control the EGR valve properly, or doesn't trust its position sensor. OK to drive, but have it checked soon. The repair usually costs about €80–500 in Estonia. The most common cause: valve clogged with soot.

Is it safe to drive?OK to driveOK to drive, but have it checked soon.
Typical repair cost€80–500parts and labour in Estonia

What it means

The engine computer can't control the EGR valve properly, or doesn't trust its position sensor. The sensor voltage is too high. Usually a wire is shorted or the sensor has failed.

What could be wrong

  1. 1Valve clogged with soot
  2. 2Valve connector or wire
  3. 3Valve motor or position sensor has failed

What you can check yourself

Check the EGR valve connector. The valve is near the intake manifold. You can check the simple things yourself, but the repair is best done in a workshop.

How we fix it

  1. We measure valve control and the position sensor
  2. We clean the valve
  3. We replace the valve

Standard SAE description: EGR A Control Circuit High

Want a definite answer?

Bring the car to our workshop in Estonia for diagnostics. We read the fault codes, test the sensors and tell you what is wrong. Repair price depends on the work involved, generally €45 per hour.

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Questions

What does fault code P0490 mean?

Short circuit in the EGR valve wiring. The engine computer can't control the EGR valve properly, or doesn't trust its position sensor. The sensor voltage is too high. Usually a wire is shorted or the sensor has failed.

Can I drive with code P0490?

OK to drive, but have it checked soon.

How much does it cost to fix P0490?

Roughly €80–500 in Estonia. The price depends on exactly what has failed and on the car.

How is P0490 fixed?

We measure valve control and the position sensor. We clean the valve. We replace the valve.

Related codes

P0400EGR valve not working properlyP0401Too little gas flowing through the EGR valveP0402Too much gas flowing through the EGR valveP0403Fault in the EGR valve wiringP0404EGR valve isn't where it should beP0405EGR valve position sensor signal too lowP0406EGR valve position sensor signal too highP0411Secondary air pump not delivering enough air

This information is general and prices are approximate (Estonian workshop rates). The same code can mean different things on different cars. Only an inspection of the car gives a definite answer.

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