Powertrain, generic (extended)

P2414 O2 Sensor Exhaust Sample Error (Bank 1 Sensor 1)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P2414 means the front air-fuel ratio sensor of bank 1 reports a reading that cannot come from real exhaust, usually a lean value caused by air leaking in ahead of the sensor or a sensor that is damaged. VW's January 2014 Golf/GTI data book uses two windows, a signal voltage of 3.10-4.81 V and a sensor signal of 2.5-3.2 V, with a second set near 2.5 V; another engine uses 3.1-4.77 V and 2.5-3.06 V. VW's bulletin 2038575 for the 2013-14 Jetta and Beetle 2.0 found that the catalyst-heating strategy could damage the front sensor, so the ECM is reprogrammed first and the sensor then replaced. GM's 2005 table for the 3.5 L L66 engine sets it when the A/F sensor stays above 2.3 V for 7 s. P2415 is bank 2. Expect a warning light and possibly higher consumption.

Likely causes

Air drawn in through a leak ahead of the sensor (manifold, gasket, cracked pipe)
Front sensor damaged by the catalyst-heating strategy (VW Jetta/Beetle 2.0, software update)
Loose, aged or contaminated air-fuel sensor

Symptoms

  • Check engine light
  • Higher fuel consumption or uneven idle
  • Ticking noise from an exhaust leak

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 bank1 sensor1exhaust systemoxygen sensor wiring

Related codes

P2415P2237P2A00P0171

References: static.nhtsa.gov, static.nhtsa.gov, gsi.ext.gm.com, law.cornell.edu.