OBD Guide
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P063A

Generator Voltage Sense Circuit A

P063A is an OBD-II diagnostic trouble code meaning: Generator Voltage Sense Circuit A. Common causes: open or short circuit in the generator voltage sensor circuit, oxidation of generator connectors. Estimated repair cost: $11–278.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$11–278 (est.)

Symptoms

  • Check Engine light comes on
  • Unstable or increased voltage of the on-board network
  • Battery may drain quickly
  • Flickering or unstable lighting
  • Charging system warning on instrument panel

Causes

  • Open or short circuit in the generator voltage sensor circuit
  • Oxidation of generator connectors
  • Malfunction of the voltage sensor inside the generator
  • Generator voltage regulator malfunction
  • ECU malfunction

How to Fix

  1. Check the voltage of the on-board network with a multimeter (normal: 13.5–14.5 V with the engine running)
  2. Inspect the wiring and connectors of the generator
  3. Check the continuity of the voltage sensor circuit according to the diagram
  4. Check generator voltage regulator
  5. If necessary, replace the generator or repair it

Related codes

P063BP063CP063DP0622P0625P0626

Error P063A by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P063A code mean?

P063A is an OBD-II diagnostic trouble code that indicates: Generator Voltage Sense Circuit A

What causes a P063A error code?

The most common causes of P063A include: Open or short circuit in the generator voltage sensor circuit; Oxidation of generator connectors; Malfunction of the voltage sensor inside the generator; Generator voltage regulator malfunction.

How do I fix a P063A diagnostic trouble code?

To fix P063A: Check the voltage of the on-board network with a multimeter (normal: 13.5–14.5 V with the engine running). Inspect the wiring and connectors of the generator. Check the continuity of the voltage sensor circuit according to the diagram. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P063A?

Limited driving only, diagnose soon

How much does it cost to fix P063A?

The estimated repair cost for P063A is $11–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat