P0E82 code meaning
Auxiliary Cooling System Coolant Temperature Sensor A Circuit Range/Performance
Powertrain system Generic code P0Exx codes Check engine light
What P0E82 means
P0E82 is set when temperature sensor A of the auxiliary cooling loop delivers a clean electrical signal whose value does not make sense against other temperatures. No manufacturer documents P0E82 publicly, but Ford's 2019 hybrid summary spells out such a plausibility test for its heater-loop sensor ECT2 under P2183. After at least 360 minutes of soak both coolant sensors must agree within 30 °F; with the loops joined and the electric pump above 2,500 rpm for 90 seconds, ECT2 plus a 7 °F hose loss must stay within 30 °F of the engine sensor; and the reading must stay between −30 and 275 °F. CARB includes hybrid component temperature sensors in its rationality requirements. A sensor that drifts, or a stuck bypass valve that keeps the loops apart, can trip it. Pure circuit faults are P0E81, P0E83 and P0E84.
P0E82 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P0E82
- Check engine light
- Cabin heat regulation off target
Common causes of P0E82
- Most likelySensor A reading drifted out of tolerance
- PossibleStuck bypass valve keeping the loops from mixing
- PossibleLow coolant or air around the sensor tip
- Less likelyCorroded terminals shifting the signal
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Aux cooling coolant temp sensor aWiring harness
What each part of P0E82 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 82 | The exact fault in that area. |
What to do next
- Note P0E82 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 P0E82
What does P0E82 mean?
P0E82 means "Auxiliary Cooling System Coolant Temperature Sensor A Circuit Range/Performance". P0E82 is set when temperature sensor A of the auxiliary cooling loop delivers a clean electrical signal whose value does not make sense against other temperatures. It is a generic code, so it means the same on every make.
Is it safe to drive with P0E82?
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 P0E82 fail an emissions test?
Yes, it can. P0E82 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 P0E82 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0E82 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.