OBD Guide
ENFRDEESPT

P3429

Cylinder 4 Exhaust Valve Control Circuit/Open

P3429 is an OBD-II diagnostic trouble code meaning: Cylinder 4 Exhaust Valve Control Circuit/Open. Common causes: malfunction of the solenoid valve control of the exhaust valve of cylinder no. 4, open or short circuit in control circuit wiring. Estimated repair cost: $28–111.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$28–111 (est.)

Symptoms

  • Check Engine light comes on
  • Decreased fuel economy
  • Unstable engine operation
  • The engine runs intermittently
  • Possible loss of power

Causes

  • Malfunction of the solenoid valve control of the exhaust valve of cylinder No. 4
  • Open or short circuit in control circuit wiring
  • Poor connection in solenoid valve connector
  • Engine control module (ECU) malfunction
  • Wiring harness damage

How to Fix

  1. Check the #4 cylinder solenoid valve wiring and connectors for damage or corrosion.
  2. Check the solenoid valve for resistance and functionality.
  3. Check the continuity of the control circuit from the ECU to the solenoid valve.
  4. Replace the faulty solenoid valve.
  5. Replace or reprogram the ECU if necessary.

Related codes

P3400P3425P3427

Error P3429 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P3429 code mean?

P3429 is an OBD-II diagnostic trouble code that indicates: Cylinder 4 Exhaust Valve Control Circuit/Open

What causes a P3429 error code?

The most common causes of P3429 include: Malfunction of the solenoid valve control of the exhaust valve of cylinder No. 4; Open or short circuit in control circuit wiring; Poor connection in solenoid valve connector; Engine control module (ECU) malfunction.

How do I fix a P3429 diagnostic trouble code?

To fix P3429: Check the #4 cylinder solenoid valve wiring and connectors for damage or corrosion.. Check the solenoid valve for resistance and functionality.. Check the continuity of the control circuit from the ECU to the solenoid valve.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P3429?

Yes, but get it checked soon

How much does it cost to fix P3429?

The estimated repair cost for P3429 is $28–111. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat