OBD Guide
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P0402

EGR A Flow Excessive Detected

P0402 is an OBD-II diagnostic trouble code meaning: EGR A Flow Excessive Detected. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Unstable engine idling
  • Reduced engine power
  • Increased fuel consumption
  • Engine detonation (knock)
  • Difficulty starting the engine

How to Fix

  1. Check the operation of the EGR valve (mechanical check)
  2. Clean or replace EGR valve if necessary
  3. Check the EGR valve control circuit
  4. Check the operation of the EGR solenoid valve
  5. Clean or replace EGR pipes
  6. Reset fault codes and test drive
  7. If necessary, replace the engine control unit

Related codes

P0401P0403P0404P0300

Error P0402 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0402 code mean?

P0402 is an OBD-II diagnostic trouble code that indicates: EGR A Flow Excessive Detected

How do I fix a P0402 diagnostic trouble code?

To fix P0402: Check the operation of the EGR valve (mechanical check). Clean or replace EGR valve if necessary. Check the EGR valve control circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0402?

Limited driving only, diagnose soon

How much does it cost to fix P0402?

The estimated repair cost for P0402 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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