P2182 code meaning
Engine Coolant Temperature Sensor 2 Circuit
Powertrain system Generic code P21xx codes Check engine light
What P2182 means
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.
P2182 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2182
- Check engine light
- Radiator fan runs continuously as a precaution
- Thermostat or cooling diagnostics unavailable
Common causes of P2182
- Most likelyLoose, corroded or water-damaged connector at sensor 2
- PossibleSignal or reference wire to sensor 2 open or damaged
- PossibleSensor 2 itself defective
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Engine coolant temperature sensor 2
What each part of P2182 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 1 | Area: fuel and air metering. |
| 82 | The exact fault in that area. |
What to do next
- Note P2182 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2182
What does P2182 mean?
P2182 means "Engine Coolant Temperature Sensor 2 Circuit". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2182?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2182 fail an emissions test?
Yes, it can. P2182 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2182 to fix?
Difficulty: easy. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2182 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.