Powertrain, generic (extended)

P2182 Engine Coolant Temperature Sensor 2 Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2182 is the general circuit code for the second coolant temperature sensor: the module sees a fault in its wiring or signal but does not sort it into low, high or erratic. Where sensor 2 sits is up to the maker. Mazda fits it low on the radiator, VW calls it the radiator outlet sender, Ford's Escape plug-in hybrid uses it in the cabin heater loop, GM uses a second engine sensor. No maker documents P2182 itself publicly; GM, VW and others report the same sensor through the more specific P2184 to P2186. CARB demands that every coolant sensor be tested for broken circuits and readings beyond its valid span. Likely causes are an open signal wire, a loose connector or a dead sensor. Depending on the use of the sensor, fan control, thermostat diagnosis or cabin heating may run on substitute values.

Likely causes

Loose, corroded or water-damaged connector at sensor 2
Signal or reference wire to sensor 2 open or damaged
Sensor 2 itself defective

Symptoms

  • Check engine light
  • Radiator fan runs continuously as a precaution
  • Thermostat or cooling diagnostics unavailable

Repair estimate

DifficultyEasyDIY possible
Parts and labour€30–200
Time0.3–1.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

engine coolant temperature sensor 2

Related codes

P2183P2184P2185P2186P0115P01E3

References: law.cornell.edu, gsi.ext.gm.com, static.nhtsa.gov.