OBD Guide
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P0608

Control Module VSS Output A

P0608 is an OBD-II diagnostic trouble code meaning: Control Module VSS Output A. Common causes: open or short circuit in vss output signal circuit, damage to the connector or wiring between the ecu and consumers. Estimated repair cost: $11–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$11–167 (est.)

Symptoms

  • The Check Engine light comes on
  • Incorrect speedometer readings
  • Automatic transmission malfunctions
  • Failure or unstable operation of cruise control
  • Errors in speed-related ESP/ABS systems

Causes

  • Open or short circuit in VSS output signal circuit
  • Damage to the connector or wiring between the ECU and consumers
  • Internal ECU fault (signal driver output)
  • Malfunction of the device receiving the signal (instrument panel, automatic transmission ECU)
  • Signal wire shielding broken

How to Fix

  1. Read all error codes from all control units
  2. Check the wiring and connectors in the VSS output signal circuit from the ECU
  3. Measure the signal at the ECU output with an oscilloscope - compare with the norm
  4. Check the signal receiver (instrument panel, automatic transmission ECU) for errors
  5. Eliminate breaks or short circuits in the wiring
  6. If the wiring is in good condition - diagnostics and repair/replacement of the ECU

Related codes

P0609P0500P0501P0502P0503

Error P0608 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0608 code mean?

P0608 is an OBD-II diagnostic trouble code that indicates: Control Module VSS Output A

What causes a P0608 error code?

The most common causes of P0608 include: Open or short circuit in VSS output signal circuit; Damage to the connector or wiring between the ECU and consumers; Internal ECU fault (signal driver output); Malfunction of the device receiving the signal (instrument panel, automatic transmission ECU).

How do I fix a P0608 diagnostic trouble code?

To fix P0608: Read all error codes from all control units. Check the wiring and connectors in the VSS output signal circuit from the ECU. Measure the signal at the ECU output with an oscilloscope - compare with the norm. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0608?

Do not drive — repair immediately

How much does it cost to fix P0608?

The estimated repair cost for P0608 is $11–167. Actual cost depends on your vehicle, location, and labor rates.

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