Powertrain, generic (extended)

P2568 Direct Ozone Reduction Catalyst Temperature Sensor Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P2568 is the plausibility check of the sensor on a direct ozone reduction (DOR) radiator, whose coating converts ozone in the cooling air. VW's 2014 specification books for the CC and Tiguan set it on a failed ID check or a failed functional check of the temperature sensor. VW Tech Tip 19-12-01 explains that on 2009-2015 Eos, Jetta, GTI, Passat and Tiguan with the 2.0 L TSI (CCTA, CBFA) this code refers to the radiator identification sensor G611; a new radiator comes with the sensor packed separately, to be bonded on. A non-coated aftermarket radiator or an unbonded sensor therefore triggers P2568. P2569/P2570 are LIN electrical faults, P2567 the general circuit fault. CARB section (e)(14) requires DOR monitoring.

Likely causes

Aftermarket radiator without ozone coating or without the identification sensor
Identification sensor not bonded after radiator replacement
Identification/temperature sensor failed its self-test

Symptoms

  • Check engine light, often after a radiator replacement
  • No change in driveability or engine cooling
  • Possible failed emissions inspection

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–900
Time0.5–3 h

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

Parts involved

dor temperature sensorradiatorlin bus

Related codes

P2567P2569P2570P2571

References: law.cornell.edu, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.