OBD Guide
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P044B

EGR Sensor C Circuit Range/Performance

P044B is an OBD-II diagnostic trouble code meaning: EGR Sensor C Circuit Range/Performance. Common causes: faulty egr valve position sensor, open or short circuit in the sensor wiring harness. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Rough idle
  • Dips during acceleration
  • Increased fuel consumption
  • Loss of engine power
  • Check Engine Light Illuminates

Causes

  • Faulty EGR valve position sensor
  • Open or short circuit in the sensor wiring harness
  • Poor electrical connection (oxidation, corrosion of contacts)
  • Dirty or stuck EGR valve
  • Malfunction of the EGR control solenoid valve (solenoid)
  • Mechanical damage to the sensor
  • Failure of the engine control unit (ECU)

How to Fix

  1. Read trouble codes and freeze frame data with an OBD-II scanner
  2. Visually check the EGR sensor wiring harness and connectors for damage and corrosion.
  3. Check the supply voltage and reference voltage at the sensor
  4. Check sensor signal to factory specifications
  5. Clean or replace the EGR sensor if necessary
  6. Check and clean the EGR valve and channels from carbon deposits
  7. If necessary, replace the entire EGR valve assembly
  8. Clear error codes and test drive to check

Related codes

P0401P0402P0403P0404P044A

Error P044B by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P044B code mean?

P044B is an OBD-II diagnostic trouble code that indicates: EGR Sensor C Circuit Range/Performance

What causes a P044B error code?

The most common causes of P044B include: Faulty EGR valve position sensor; Open or short circuit in the sensor wiring harness; Poor electrical connection (oxidation, corrosion of contacts); Dirty or stuck EGR valve.

How do I fix a P044B diagnostic trouble code?

To fix P044B: Read trouble codes and freeze frame data with an OBD-II scanner. Visually check the EGR sensor wiring harness and connectors for damage and corrosion.. Check the supply voltage and reference voltage at the sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P044B?

Limited driving only, diagnose soon

How much does it cost to fix P044B?

The estimated repair cost for P044B is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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