Powertrain, generic (extended)

P2415 O2 Sensor Exhaust Sample Error (Bank 2 Sensor 1)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P2415 indicates that the upstream air-fuel sensor on bank 2 is not reading a representative exhaust sample - typically because outside air is drawn in through a leak near the sensor or the sensor is not seated correctly, so the reading is implausibly lean. VW's 2014 specification books for the Passat, CC and Touareg evaluate the sensor signal voltage against two bands, 3.70-4.81 V and a lower band of 2.51-3.00 V or 3.0-3.70 V, the band being switched with the gain factor used for the sensor characteristic. P2414 is the identical check on bank 1. CARB requires fuel-control sensors to be monitored for every parameter that affects emissions. Expect a warning light and possibly rough running and higher consumption.

Likely causes

Exhaust leak ahead of or near the sensor (manifold, gasket, flex pipe)
Sensor loose or installed incorrectly
Aged or contaminated wide-band sensor

Symptoms

  • Check engine light
  • Ticking exhaust noise when a leak is present
  • Higher fuel consumption or uneven running

Repair estimate

DifficultyMediumDIY possible
Parts and labour€60–500
Time0.5–3 h

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

Parts involved

oxygen sensor bank2 sensor1exhaust systemoxygen sensor wiring

Related codes

P2414P0174P2254

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