Powertrain, generic (extended)

P2569 Direct Ozone Reduction Catalyst Temperature Sensor Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2569 means the radiator-mounted sensor of a DOR system (direct ozone reduction: a radiator coating that breaks down ozone in the incoming air) shows an electrical fault toward ground. According to VW's 2014 data books for the CC with 2.0 L TSI (CBFA, CCTA) and the Tiguan (CCTA), the sensor talks to the engine computer over a LIN line, and P2569 is set when that link fails because the line is grounded. The same books assign an open line or a short to battery voltage to P2570, while P2568 covers the identity and function check. Typical triggers are a chafed LIN wire touching the body or a corroded radiator connector. The car drives normally, but the stored code can fail an emissions inspection.

Likely causes

LIN wire to the radiator sensor chafed and shorted to ground
Water or salt corrosion in the radiator sensor connector
Internal short in the radiator sensor

Symptoms

  • Check engine light on
  • No change in driveability or engine temperature
  • Emissions inspection may be refused

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€40–900
Time0.5–3 h

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

Parts involved

dor temperature sensorsensor wiring

Related codes

P2567P2568P2570P2571

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