OBD Guide
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P23C9

Fuel Heater Control Module Power Control Circuit High

P23C9 is an OBD-II diagnostic trouble code meaning: Fuel Heater Control Module Power Control Circuit High. Common causes: malfunction of the fuel heating module, open or short circuit in control circuit. Estimated repair cost: $33–111.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$33–111 (est.)

Symptoms

  • Difficulty starting the engine in cold weather
  • Unstable engine operation at idle
  • Reduced engine power
  • Increased fuel consumption
  • Check Engine indicator on the dashboard

Causes

  • Malfunction of the fuel heating module
  • Open or short circuit in control circuit
  • Problems with the fuel heating relay
  • Engine control unit (ECU) malfunction
  • Corroded contacts or damaged connectors

How to Fix

  1. Check the integrity of the heating module control circuit
  2. Check the functionality of the fuel heating relay
  3. Diagnose the fuel heating module
  4. Check connectors and connections for corrosion
  5. If necessary, replace the fuel heating module

Related codes

P23C8P23CAP23CB

Error P23C9 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P23C9 code mean?

P23C9 is an OBD-II diagnostic trouble code that indicates: Fuel Heater Control Module Power Control Circuit High

What causes a P23C9 error code?

The most common causes of P23C9 include: Malfunction of the fuel heating module; Open or short circuit in control circuit; Problems with the fuel heating relay; Engine control unit (ECU) malfunction.

How do I fix a P23C9 diagnostic trouble code?

To fix P23C9: Check the integrity of the heating module control circuit. Check the functionality of the fuel heating relay. Diagnose the fuel heating module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P23C9?

Yes, but get it checked soon

How much does it cost to fix P23C9?

The estimated repair cost for P23C9 is $33–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat