Diagnostic article Generic OBD-II
P2414: front oxygen-signal limits depend on the selected gain characteristic
Audi's CAED P2414 row switches oxygen-signal thresholds with the gain used for the sensor characteristic, so one universal voltage cutoff is misleading.
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Documented application
Audi 2014 A6/S6 Quick Reference Specification Book, September 2013, Engine Code CAED, DTC chart. Thresholds only describe this documented monitor; not universal across other makes or engines.
The code alone does not identify a failed part or establish that a vehicle is safe to drive. Confirm the vehicle, reporting module and applicable service procedure.
P2414 describes an exhaust-sample or signal-range problem for bank 1's front oxygen sensor. Audi's CAED chart lists two threshold bands and explains that the selected threshold depends on the gain factor used for the sensor characteristic. The gain context is therefore part of interpreting the voltage.
One value does not tell the entire story
The source gives bands of 3.10–4.81 V and 2.5–3.10 V. It does not describe them as two normal operating ranges that every measurement should satisfy simultaneously. As diagnostic interpretation, comparing a recorded voltage with the wrong selected characteristic could misstate the monitor's conclusion.
The row also does not prove that the exhaust sample itself contains a particular oxygen concentration or that the sensor must be replaced. It describes how the signal is evaluated, not a complete cause-isolation procedure.
Preserve the calibration context
Use the CAED diagnostic information to establish the relevant sensor, operating state and gain-dependent evaluation. The quick-reference book does not supply a universal test at an identified connector pin. This explanation is scoped to the 2014 Audi A6/S6 CAED chart; other engines in the same book can use different signal-range criteria and should not inherit these bands automatically.
Article source documents
Source checks describe how the text was prepared; they do not certify a diagnosis or confirm compatibility with every vehicle using this code.
Original code reference
Dictionary definition
O2 Sensor Exhaust Sample Error Bank 1 Sensor 1
This definition retains its original catalog scope. The article above is limited to its explicitly documented application.
Reference scope
Generic OBD-II definition.
A manufacturer label does not establish the model, year, engine or module to which a diagnosis applies. Read the safety and diagnostic limits.
Definition source
- DTC Database: pinned community code definitions
Source checked · MIT