OBD Guide
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P04E1

Crankcase Ventilation Hose Connection Sensor Circuit

P04E1 is an OBD-II diagnostic trouble code meaning: Crankcase Ventilation Hose Connection Sensor Circuit. Common causes: open or short circuit in the sensor circuit, faulty ventilation hose connection sensor. Estimated repair cost: $22–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–89 (est.)

Symptoms

  • Check Engine Light Is On
  • Possibly unstable operation at idle
  • The smell of oil in the cabin when the system is depressurized
  • Oil deposits in the intake manifold
  • Increased oil consumption

Causes

  • Open or short circuit in the sensor circuit
  • Faulty ventilation hose connection sensor
  • Disconnected or damaged crankcase ventilation hose
  • Oxidation of the sensor connector
  • ECU malfunction

How to Fix

  1. Read error codes with scanner
  2. Visually inspect the crankcase ventilation hoses for disconnections and damage.
  3. Find the hose connection sensor according to the diagram and inspect its connector
  4. Check the voltage in the sensor circuit with a multimeter
  5. Check the integrity of the sensor wiring
  6. Make sure all connections of the ventilation system are tight.
  7. Replace the sensor if it is faulty
  8. Reset the error and take a test drive

Related codes

P04FBP04FCP051CP0171

Error P04E1 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P04E1 code mean?

P04E1 is an OBD-II diagnostic trouble code that indicates: Crankcase Ventilation Hose Connection Sensor Circuit

What causes a P04E1 error code?

The most common causes of P04E1 include: Open or short circuit in the sensor circuit; Faulty ventilation hose connection sensor; Disconnected or damaged crankcase ventilation hose; Oxidation of the sensor connector.

How do I fix a P04E1 diagnostic trouble code?

To fix P04E1: Read error codes with scanner. Visually inspect the crankcase ventilation hoses for disconnections and damage.. Find the hose connection sensor according to the diagram and inspect its connector. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P04E1?

Limited driving only, diagnose soon

How much does it cost to fix P04E1?

The estimated repair cost for P04E1 is $22–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat