OBD Guide
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U05A6

Invalid Data Received from Reductant Heater Control Module

U05A6 is an OBD-II diagnostic trouble code meaning: Invalid Data Received from Reductant Heater Control Module. Common causes: open or short circuit in the communication circuit, malfunction of the reagent heating module. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced engine power
  • Increased fuel consumption
  • SCR error message on dashboard
  • Increased NOx emissions

Causes

  • Open or short circuit in the communication circuit
  • Malfunction of the reagent heating module
  • Problems with the wiring harness or connectors
  • ECU software errors
  • Contact corrosion in electrical connections

How to Fix

  1. Check the integrity of the wiring harness to the heating module
  2. Check connections and connectors for corrosion
  3. Test the reagent heating module
  4. Update ECU software if necessary
  5. Replace the heating module if a malfunction is detected

Related codes

U05A5U05A7U0100

Error U05A6 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the U05A6 code mean?

U05A6 is an OBD-II diagnostic trouble code that indicates: Invalid Data Received from Reductant Heater Control Module

What causes a U05A6 error code?

The most common causes of U05A6 include: Open or short circuit in the communication circuit; Malfunction of the reagent heating module; Problems with the wiring harness or connectors; ECU software errors.

How do I fix a U05A6 diagnostic trouble code?

To fix U05A6: Check the integrity of the wiring harness to the heating module. Check connections and connectors for corrosion. Test the reagent heating module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U05A6?

Yes, but get it checked soon

How much does it cost to fix U05A6?

The estimated repair cost for U05A6 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat