OBD Guide
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P063D

Generator Voltage Sense Circuit A High

P063D is an OBD-II diagnostic trouble code meaning: Generator Voltage Sense Circuit A High. Common causes: short circuit of the sensor signal wire to power supply positive, generator voltage regulator malfunction. Estimated repair cost: $11–278.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$11–278 (est.)

Symptoms

  • Check Engine light comes on
  • High voltage on-board network (above 15 V)
  • Flashing or burning out lamps
  • Battery overheating
  • Incorrect operation of electronic components

Causes

  • Short circuit of the sensor signal wire to power supply positive
  • Generator voltage regulator malfunction
  • Damage to the wiring insulation in the harness
  • Lost contact in the connector (accidental contact with positive)
  • ECU malfunction

How to Fix

  1. Measure the actual on-board voltage with a multimeter
  2. Check the sensor signal wire for a short circuit with the positive wire
  3. Inspect the generator wiring harness for damaged insulation.
  4. Check generator voltage regulator
  5. If a regulator malfunction is confirmed, replace the regulator or generator

Related codes

P063AP063BP063CP0563P0622

Error P063D by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P063D code mean?

P063D is an OBD-II diagnostic trouble code that indicates: Generator Voltage Sense Circuit A High

What causes a P063D error code?

The most common causes of P063D include: Short circuit of the sensor signal wire to power supply positive; Generator voltage regulator malfunction; Damage to the wiring insulation in the harness; Lost contact in the connector (accidental contact with positive).

How do I fix a P063D diagnostic trouble code?

To fix P063D: Measure the actual on-board voltage with a multimeter. Check the sensor signal wire for a short circuit with the positive wire. Inspect the generator wiring harness for damaged insulation.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P063D?

Yes, but get it checked soon

How much does it cost to fix P063D?

The estimated repair cost for P063D is $11–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat