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EGR valve

P0402 Too much gas flowing through the EGR valve

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P0402 means: Too much gas flowing through the EGR valve. Too much exhaust gas is going into the engine. Drive gently and have the car checked soon. The repair usually costs about €80–600 in Estonia. The most common cause: EGR valve stuck open. Other possible causes: valve position sensor, valve wire or connector.

Is it safe to drive?Get it checked soonDrive gently and have the car checked soon.
Typical repair cost€80–600parts and labour in Estonia

What it means

Too much exhaust gas is going into the engine. Usually the EGR valve is stuck open. The idle may hunt and the engine may stall.

What could be wrong

  1. 1EGR valve stuck open
  2. 2Valve position sensor
  3. 3Valve wire or connector

What you can check yourself

If the idle hunts or the engine stalls, don't drive until the valve has been checked. You can check the simple things yourself, but the repair is best done in a workshop.

How we fix it

  1. We check the valve position with a diagnostic tool
  2. We clean the valve
  3. We replace the valve

Standard SAE description: Exhaust Gas Recirculation Flow Excessive Detected

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 P0402 mean?

Too much gas flowing through the EGR valve. Too much exhaust gas is going into the engine. Usually the EGR valve is stuck open. The idle may hunt and the engine may stall.

Can I drive with code P0402?

Drive gently and have the car checked soon.

How much does it cost to fix P0402?

Roughly €80–600 in Estonia. The price depends on exactly what has failed and on the car.

How is P0402 fixed?

We check the valve position with a diagnostic tool. We clean the valve. We replace the valve.

Related codes

P0400EGR valve not working properlyP0401Too little 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 airP0490Short circuit in the EGR valve wiring

Based on AI combined with our hands-on workshop experience and knowledge. 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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