P2571 code meaning
Direct Ozone Reduction Catalyst Temperature Sensor Circuit Intermittent/Erratic
Powertrain system Generic code P25xx codes Check engine light
What P2571 means
P2571 stands for an unsteady or intermittently lost signal from the temperature sensor of a direct ozone reduction (DOR) catalyst. Unlike P2569 and P2570, which describe a lasting low or high fault, this code covers readings that jump around or vanish for moments. No manufacturer publicly documents P2571; the VW specification books that use this sensor family list only P2568 to P2570. On the VW 2.0 L TSI the part is the radiator identification sensor G611, which a VW Tech Tip says is bonded to the radiator, so a sensor that has come loose or a corroded plug is a plausible cause. CARB requires DOR systems to be monitored, and BASF's PremAir coating is the best-known DOR catalyst. Driving is unaffected.
P2571 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2571
- Check engine light that may come and go
- No noticeable effect on driving or cooling
Common causes of P2571
- Most likelyLoose or corroded terminal at the radiator sensor plug
- PossibleSensor no longer firmly bonded to the radiator
- PossibleHarness damaged by vibration at the radiator mounting
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Dor temperature sensorSensor wiring
What each part of P2571 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 71 | The exact fault in that area. |
What to do next
- Note P2571 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 P2571
What does P2571 mean?
P2571 means "Direct Ozone Reduction Catalyst Temperature Sensor Circuit Intermittent/Erratic". P2571 stands for an unsteady or intermittently lost signal from the temperature sensor of a direct ozone reduction (DOR) catalyst. It is a generic code, so it means the same on every make.
Is it safe to drive with P2571?
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 P2571 fail an emissions test?
Yes, it can. P2571 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 P2571 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2571 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.