OBD Guide
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P20D8

Exhaust Aftertreatment Fuel Supply Control Performance

P20D8 is an OBD-II diagnostic trouble code meaning: Exhaust Aftertreatment Fuel Supply Control Performance. Common causes: malfunction of the fuel injection nozzle into the aftertreatment system, problems with the aftertreatment fuel pump. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Increased fuel consumption
  • Reduced engine power
  • Check Engine Light Illuminates
  • Increased emissions
  • Problems with diesel particulate filter regeneration

Causes

  • Malfunction of the fuel injection nozzle into the aftertreatment system
  • Problems with the aftertreatment fuel pump
  • Clogged fuel lines of the aftertreatment system
  • Malfunction of sensors of the after-treatment system
  • Problems with the electronic control unit

How to Fix

  1. Check the operation of the fuel injection nozzle into the aftertreatment system
  2. Diagnose the fuel pump of the aftertreatment system
  3. Check the condition of the fuel lines of the aftertreatment system
  4. Test the sensors of the aftertreatment system
  5. Check the operation of the electronic control unit

Related codes

P20D9P20DAP20DB

Error P20D8 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P20D8 code mean?

P20D8 is an OBD-II diagnostic trouble code that indicates: Exhaust Aftertreatment Fuel Supply Control Performance

What causes a P20D8 error code?

The most common causes of P20D8 include: Malfunction of the fuel injection nozzle into the aftertreatment system; Problems with the aftertreatment fuel pump; Clogged fuel lines of the aftertreatment system; Malfunction of sensors of the after-treatment system.

How do I fix a P20D8 diagnostic trouble code?

To fix P20D8: Check the operation of the fuel injection nozzle into the aftertreatment system. Diagnose the fuel pump of the aftertreatment system. Check the condition of the fuel lines of the aftertreatment system. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P20D8?

Yes, but get it checked soon

How much does it cost to fix P20D8?

The estimated repair cost for P20D8 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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