OBD Guide
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P05BA

Restraint Deployment Signal Circuit High

P05BA is an OBD-II diagnostic trouble code meaning: Restraint Deployment Signal Circuit High. Common causes: shorting the signal wire to the 12 v power wire, srs module internal fault (incorrect output signal).

Severity
🔴 High
Can you drive?
Do not drive — repair immediately

Symptoms

  • SRS/Airbag light is on
  • Check Engine May Be Active
  • Possible risk of unintentional system activation
  • Increased voltage on the signal wire during diagnostics

Causes

  • Shorting the signal wire to the 12 V power wire
  • SRS module internal fault (incorrect output signal)
  • Damage to the insulation of the harness with contact with the positive bus
  • Malfunction in the receiving ECU (incorrect reference voltage)
  • Incorrect connection during previous repair

How to Fix

  1. CRITICAL: disconnect the battery and wait at least 10 minutes before any work
  2. Read codes from the SRS module with a specialized scanner
  3. Disconnect the connector and measure the voltage on the signal wire - if it is shorted to positive there will be ~12 V
  4. Check the entire signal circuit harness for contact with the power wires.
  5. Eliminate short circuit, check insulation
  6. Diagnostics and repairs should only be performed by an authorized service center.

Related codes

P05B8P05B9P05BBB0001B0051

Error P05BA by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P05BA code mean?

P05BA is an OBD-II diagnostic trouble code that indicates: Restraint Deployment Signal Circuit High

What causes a P05BA error code?

The most common causes of P05BA include: Shorting the signal wire to the 12 V power wire; SRS module internal fault (incorrect output signal); Damage to the insulation of the harness with contact with the positive bus; Malfunction in the receiving ECU (incorrect reference voltage).

How do I fix a P05BA diagnostic trouble code?

To fix P05BA: CRITICAL: disconnect the battery and wait at least 10 minutes before any work. Read codes from the SRS module with a specialized scanner. Disconnect the connector and measure the voltage on the signal wire - if it is shorted to positive there will be ~12 V. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P05BA?

Do not drive — repair immediately

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See also: Russian version · NationStat