OBD Guide
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U066D

Lost Communication With Charge Air Cooler Temperature Sensor Bank 1

U066D is an OBD-II diagnostic trouble code meaning: Lost Communication With Charge Air Cooler Temperature Sensor Bank 1. Common causes: open or short circuit in the sensor circuit, charge air cooler temperature sensor malfunction. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced engine power
  • Increased fuel consumption
  • Possible problems with turbocharging
  • The car may go into emergency mode

Causes

  • Open or short circuit in the sensor circuit
  • Charge air cooler temperature sensor malfunction
  • Poor contact in the sensor connector
  • Wiring harness damage
  • Engine ECU malfunction

How to Fix

  1. Check the integrity of the sensor circuit (resistance, voltage)
  2. Inspect the sensor connector and contacts for oxidation or damage.
  3. Check the functionality of the temperature sensor
  4. Replace sensor if necessary
  5. Check the condition of the wiring harness between the sensor and the ECU

Related codes

U066EU0100U0121

Error U066D by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the U066D code mean?

U066D is an OBD-II diagnostic trouble code that indicates: Lost Communication With Charge Air Cooler Temperature Sensor Bank 1

What causes a U066D error code?

The most common causes of U066D include: Open or short circuit in the sensor circuit; Charge air cooler temperature sensor malfunction; Poor contact in the sensor connector; Wiring harness damage.

How do I fix a U066D diagnostic trouble code?

To fix U066D: Check the integrity of the sensor circuit (resistance, voltage). Inspect the sensor connector and contacts for oxidation or damage.. Check the functionality of the temperature sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U066D?

Yes, but get it checked soon

How much does it cost to fix U066D?

The estimated repair cost for U066D is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat