OBD Guide
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P20CB

Exhaust Aftertreatment Fuel Injector A Control Circuit/Open

P20CB is an OBD-II diagnostic trouble code meaning: Exhaust Aftertreatment Fuel Injector A Control Circuit/Open. Common causes: open circuit in the injector control circuit, exhaust purification nozzle malfunction. Estimated repair cost: $56–222.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • Check Engine Light Is On
  • Increased fuel consumption
  • Reduced engine power
  • Increased level of harmful emissions
  • Possible transition to emergency mode

Causes

  • Open circuit in the injector control circuit
  • Exhaust purification nozzle malfunction
  • Wiring Harness Problems
  • Faulty relay or fuse
  • Error in the engine control unit

How to Fix

  1. Check the integrity of the injector control circuit
  2. Check resistance and operation of the injector
  3. Inspect the wiring harness for damage
  4. Check system relays and fuses
  5. Read injector operating parameters using a scanner
  6. If necessary, replace the nozzle or repair the wiring

Related codes

P20CCP20CDP20CE

Error P20CB by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P20CB code mean?

P20CB is an OBD-II diagnostic trouble code that indicates: Exhaust Aftertreatment Fuel Injector A Control Circuit/Open

What causes a P20CB error code?

The most common causes of P20CB include: Open circuit in the injector control circuit; Exhaust purification nozzle malfunction; Wiring Harness Problems; Faulty relay or fuse.

How do I fix a P20CB diagnostic trouble code?

To fix P20CB: Check the integrity of the injector control circuit. Check resistance and operation of the injector. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P20CB?

Yes, but get it checked soon

How much does it cost to fix P20CB?

The estimated repair cost for P20CB is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat