OBD Guide
ENFRDEESPT

P05FB

Stop-Start Status Signal Circuit High

P05FB is an OBD-II diagnostic trouble code meaning: Stop-Start Status Signal Circuit High. Common causes: short circuit of status signal wire to power supply (+12v or +5v), malfunction of the control unit generating the status signal. Estimated repair cost: $22–167.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$22–167 (est.)

Symptoms

  • Start-stop system blocked
  • The start-stop system malfunction indicator is on
  • Check Engine Light Is On
  • Possible associated CAN network errors

Causes

  • Short circuit of status signal wire to power supply (+12V or +5V)
  • Malfunction of the control unit generating the status signal
  • Damage to the signal wire insulation (touching the positive bus)
  • Incorrect connection after repair
  • Engine ECU malfunction

How to Fix

  1. Read codes, check all errors in the start-stop system
  2. Measure the voltage on the status signal line with the ignition on and off
  3. If the voltage is high when the ignition is turned off, there is a short circuit in the wiring
  4. Disable control units one by one to localize the source of the high signal
  5. Check the wiring for contact with the positive tires
  6. Replace or reprogram the faulty unit

Related codes

P05F9P05FAP0A7F

Error P05FB by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P05FB code mean?

P05FB is an OBD-II diagnostic trouble code that indicates: Stop-Start Status Signal Circuit High

What causes a P05FB error code?

The most common causes of P05FB include: Short circuit of status signal wire to power supply (+12V or +5V); Malfunction of the control unit generating the status signal; Damage to the signal wire insulation (touching the positive bus); Incorrect connection after repair.

How do I fix a P05FB diagnostic trouble code?

To fix P05FB: Read codes, check all errors in the start-stop system. Measure the voltage on the status signal line with the ignition on and off. If the voltage is high when the ignition is turned off, there is a short circuit in the wiring. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P05FB?

Yes, but get it checked soon

How much does it cost to fix P05FB?

The estimated repair cost for P05FB is $22–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat