OBD Guide
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U0616

Lost Communication With Engine Coolant Bypass Valve B

U0616 is an OBD-II diagnostic trouble code meaning: Lost Communication With Engine Coolant Bypass Valve B. Common causes: engine coolant bypass valve b malfunction, problems with wiring or connectors. Estimated repair cost: $17–78.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–78 (est.)

Symptoms

  • Check Engine Light Is On
  • The engine may overheat
  • Unstable engine operation
  • Reduced engine performance
  • Increased fuel consumption

Causes

  • Engine coolant bypass valve B malfunction
  • Problems with wiring or connectors
  • Engine control module (ECU) malfunction
  • Open or short circuit in the communication circuit
  • Problems with the CAN bus

How to Fix

  1. Check the engine coolant bypass valve B wiring and connectors for damage.
  2. Check engine coolant bypass valve B for proper operation.
  3. Check the engine control module (ECU) for problems.
  4. Check the CAN bus for breaks or short circuits.
  5. Replace faulty components.

Related codes

U0615U0617U0100

Error U0616 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the U0616 code mean?

U0616 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Engine Coolant Bypass Valve B

What causes a U0616 error code?

The most common causes of U0616 include: Engine coolant bypass valve B malfunction; Problems with wiring or connectors; Engine control module (ECU) malfunction; Open or short circuit in the communication circuit.

How do I fix a U0616 diagnostic trouble code?

To fix U0616: Check the engine coolant bypass valve B wiring and connectors for damage.. Check engine coolant bypass valve B for proper operation.. Check the engine control module (ECU) for problems.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U0616?

Yes, but get it checked soon

How much does it cost to fix U0616?

The estimated repair cost for U0616 is $17–78. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat