P2182Engine Coolant Temperature Sensor 2 Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- 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.
- What you may notice
- Check engine light
- Radiator fan runs continuously as a precaution
- Thermostat or cooling diagnostics unavailable
- Likely causes
- LikelyLoose, corroded or water-damaged connector at sensor 2
- PossibleSignal or reference wire to sensor 2 open or damaged
- PossibleSensor 2 itself defective
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €30 – €200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.