OBD Guide
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P041A

EGR Temperature Sensor B Circuit

P041A is an OBD-II diagnostic trouble code meaning: EGR Temperature Sensor B Circuit. Common causes: faulty egr temperature sensor b, open or short circuit in the sensor circuit. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$6–56 (est.)

Symptoms

  • Check Engine light is on
  • Unstable operation of the EGR system
  • Increased fuel consumption
  • Increased NOx emissions
  • In some cases - harsh engine operation under load
  • Emergency EGR control mode possible

Causes

  • Faulty EGR temperature sensor B
  • Open or short circuit in the sensor circuit
  • Oxidation or corrosion of the sensor connector
  • Damage to wiring due to high temperatures (sensor located in hot gas area)
  • Clogged or leaking EGR system
  • ECU malfunction (rare)

How to Fix

  1. Read all error codes with scanner
  2. Check the voltage in the EGR temperature sensor circuit B with the ignition on
  3. Inspect the wiring and connector for melts, insulation cracks, and oxidation.
  4. Measure the resistance of the sensor (NTC thermistor) and compare with the table of values
  5. Check the sensor ground circuit
  6. Replace EGR temperature sensor B if the fault is confirmed
  7. Clean the EGR system from carbon deposits if necessary.
  8. Reset the code and take a test drive

Related codes

P041BP041CP041DP0400P0401P0404P0405P0406

Error P041A by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P041A code mean?

P041A is an OBD-II diagnostic trouble code that indicates: EGR Temperature Sensor B Circuit

What causes a P041A error code?

The most common causes of P041A include: Faulty EGR temperature sensor B; Open or short circuit in the sensor circuit; Oxidation or corrosion of the sensor connector; Damage to wiring due to high temperatures (sensor located in hot gas area).

How do I fix a P041A diagnostic trouble code?

To fix P041A: Read all error codes with scanner. Check the voltage in the EGR temperature sensor circuit B with the ignition on. Inspect the wiring and connector for melts, insulation cracks, and oxidation.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P041A?

Do not drive — repair immediately

How much does it cost to fix P041A?

The estimated repair cost for P041A is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat