Powertrain, generic (extended)

P2570 Direct Ozone Reduction Catalyst Temperature Sensor Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2570 is the high-side electrical fault of the sensor fitted to a DOR radiator, the ozone-converting coated radiator found on some low-emission petrol cars. VW's 2014 Tiguan book (2.0 L TSI, CCTA) logs it when LIN communication with the sensor breaks down because the line is interrupted or carries battery voltage; the 2014 CC book applies the same criterion to its CBFA and CCTA engines. A connector left unplugged after radiator work, a broken wire or a dead sensor are the usual reasons. VW Tech Tip 19-12-01 adds that a new radiator is delivered with this sensor loose, so it has to be glued on and connected. P2569 is the shorted-to-ground case. Cooling and driveability are unaffected; the MIL and inspection readiness are what matter.

Likely causes

Sensor not connected or not fitted after radiator replacement
Broken LIN wire or loose terminal
Radiator sensor failed

Symptoms

  • Check engine light, often right after radiator work
  • Engine runs and cools normally

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€20–900
Time0.3–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

dor temperature sensorsensor wiring

Related codes

P2567P2568P2569P2571

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.