OBD Guide
ENFRDEESPT

P0090

Fuel Pressure Regulator A Control Circuit/Open

P0090 is an OBD-II diagnostic trouble code meaning: Fuel Pressure Regulator A Control Circuit/Open. Common causes: faulty fuel pressure regulator, damage to control circuit wiring. Estimated repair cost: $89–278.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$89–278 (est.)

Symptoms

  • Unstable engine idling
  • Loss of engine power
  • Difficulty starting the engine
  • Increased fuel consumption
  • Jerks when accelerating
  • Check Engine Light Is On
  • Black smoke from the exhaust pipe
  • Smell of fuel in the passenger compartment or engine compartment

Causes

  • Faulty fuel pressure regulator
  • Damage to control circuit wiring
  • Poor electrical contacts or corroded connectors
  • Control solenoid malfunction
  • Short circuit in control circuit
  • Open circuit in the regulator power supply circuit
  • Engine control unit (ECU) malfunction
  • Fuel filter clogged

How to Fix

  1. Connect the OBD-II scanner and read all error codes
  2. Check the condition of the fuel system fuses
  3. Inspect the wiring and connectors of the fuel pressure regulator
  4. Measure the resistance of the regulator winding with a multimeter
  5. Check the supply voltage at the regulator connector
  6. Perform a control circuit continuity test
  7. Check the fuel pressure in the rail with a pressure gauge
  8. If necessary, replace the fuel pressure regulator
  9. Clean or replace damaged connectors
  10. Clear error codes and take a test drive

Related codes

P0089P0091P0092P0093P0094P0190P0191P0192

Error P0090 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0090 code mean?

P0090 is an OBD-II diagnostic trouble code that indicates: Fuel Pressure Regulator A Control Circuit/Open

What causes a P0090 error code?

The most common causes of P0090 include: Faulty fuel pressure regulator; Damage to control circuit wiring; Poor electrical contacts or corroded connectors; Control solenoid malfunction.

How do I fix a P0090 diagnostic trouble code?

To fix P0090: Connect the OBD-II scanner and read all error codes. Check the condition of the fuel system fuses. Inspect the wiring and connectors of the fuel pressure regulator. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0090?

Limited driving only, diagnose soon

How much does it cost to fix P0090?

The estimated repair cost for P0090 is $89–278. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat