P2466 code meaning
Exhaust Gas Temperature Sensor Circuit (Bank 2 Sensor 3)
Powertrain system Generic code P24xx codes Check engine light
What P2466 means
P2466 is the general circuit code for the third exhaust temperature probe in the bank 2 exhaust path, so it only appears on engines with two separate aftertreatment lines. No manufacturer documents this exact code publicly. The bank 1 counterpart P242A shows how makers fill such a general code: Ford's 2023 diesels use it for a probe that departs more than 80 °C from its modelled value for 20 s, while other makers attach open-circuit detection to it. CARB requires every emission-relevant sensor to be checked for circuit continuity and plausibility. Expect the controller to distrust the reading, to pause regeneration or DEF dosing that relies on it and to light the MIL. Clear low and high signal faults of this probe go to P2468 and P2469 instead.
P2466 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2466
- MIL on
- Implausible or missing value for this probe in live data
- Filter regeneration or DEF dosing suspended
Common causes of P2466
- Most likelyTemperature probe failed internally or open
- PossibleConnector or wiring near the exhaust damaged by heat
- Less likelyProbe loose or not reaching into the gas stream
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Egt sensor b2s3
What each part of P2466 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 66 | The exact fault in that area. |
What to do next
- Note P2466 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 P2466
What does P2466 mean?
P2466 means "Exhaust Gas Temperature Sensor Circuit (Bank 2 Sensor 3)". P2466 is the general circuit code for the third exhaust temperature probe in the bank 2 exhaust path, so it only appears on engines with two separate aftertreatment lines. It is a generic code, so it means the same on every make.
Is it safe to drive with P2466?
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 P2466 fail an emissions test?
Yes, it can. P2466 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 P2466 to fix?
Difficulty: medium. 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 P2466 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.