OBD Guide
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U0406

Invalid Data Received From Fuel Injector Control Module

U0406 is an OBD-II diagnostic trouble code meaning: Invalid Data Received From Fuel Injector Control Module. Common causes: malfunction of the fuel injector control module, damage to the wiring harness between modules. Estimated repair cost: $56–167.

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

Symptoms

  • Check Engine light comes on
  • Increased fuel consumption
  • Loss of engine power
  • Rough idle
  • Problems starting the engine

Causes

  • Malfunction of the fuel injector control module
  • Damage to the wiring harness between modules
  • Poor contact in connectors
  • Problems with power supply to the injector control module
  • Software error in the ECU

How to Fix

  1. Check the integrity of the wiring harness between the modules
  2. Inspect and clean the contacts in the connectors
  3. Check power and ground of injector control module
  4. Scan the injector control module for errors
  5. If necessary, replace the injector control module

Related codes

U0401U0402U0405

Error U0406 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the U0406 code mean?

U0406 is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From Fuel Injector Control Module

What causes a U0406 error code?

The most common causes of U0406 include: Malfunction of the fuel injector control module; Damage to the wiring harness between modules; Poor contact in connectors; Problems with power supply to the injector control module.

How do I fix a U0406 diagnostic trouble code?

To fix U0406: Check the integrity of the wiring harness between the modules. Inspect and clean the contacts in the connectors. Check power and ground of injector control module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U0406?

Yes, but get it checked soon

How much does it cost to fix U0406?

The estimated repair cost for U0406 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat