OBD Guide
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B3670

Pump Motor Temperature Sensor Circuit

B3670 is an OBD-II diagnostic trouble code meaning: Pump Motor Temperature Sensor Circuit. Common causes: broken wire in the temperature sensor circuit, short circuit in the sensor circuit. Estimated repair cost: $22–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–167 (est.)

Symptoms

  • Warning about overheating of the corresponding system
  • Reducing pump power or switching to emergency mode
  • The corresponding fault indicator lights up
  • Unstable operation of the steering or brake system
  • Error code persists after reset

Causes

  • Broken wire in the temperature sensor circuit
  • Short circuit in the sensor circuit
  • Oxidation of the sensor connector
  • Malfunction of the temperature sensor itself
  • Pump control module malfunction

How to Fix

  1. Read error codes and determine the system to which the pump belongs
  2. Inspect the temperature sensor connector for oxidation and damage.
  3. Measure the resistance of the sensor at a known temperature (check with the characteristic)
  4. Check the supply voltage and integrity of the sensor ground
  5. Replace the temperature sensor if the fault is confirmed
  6. Reset codes and check system operation

Related codes

B3671B3672B3669

Error B3670 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the B3670 code mean?

B3670 is an OBD-II diagnostic trouble code that indicates: Pump Motor Temperature Sensor Circuit

What causes a B3670 error code?

The most common causes of B3670 include: Broken wire in the temperature sensor circuit; Short circuit in the sensor circuit; Oxidation of the sensor connector; Malfunction of the temperature sensor itself.

How do I fix a B3670 diagnostic trouble code?

To fix B3670: Read error codes and determine the system to which the pump belongs. Inspect the temperature sensor connector for oxidation and damage.. Measure the resistance of the sensor at a known temperature (check with the characteristic). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B3670?

Do not drive — repair immediately

How much does it cost to fix B3670?

The estimated repair cost for B3670 is $22–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat