Diagnostic article Generic OBD-II
P246E: identify exhaust-temperature sensor 4 before trusting its display label
Ross-Tech warns that measuring-value labels can misidentify the fourth exhaust-temperature sensor on specific Audi CAGA applications.
Read before applying this article
Documented application
Ross-Tech independent VAG diagnostic guidance; match complete fault description and controller. Vehicle-specific notes do not establish universal applicability.
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.
P246E describes an electrical malfunction of bank 1 exhaust-temperature sensor 4 in Ross-Tech's reference. The source identifies sensor or wiring failure as possibilities and lists reduced power, limp mode and several warning indicators as possible effects. Correct sensor identification is particularly important before parts are ordered.
A measuring-value label can be misleading
For rest-of-world Audi A4 B8 applications with the CAGA engine and UDS diagnostics, Ross-Tech warns that exhaust-temperature measuring values may be incorrectly labeled. It specifically directs attention to ENG106430, labeled as temperature before the particulate filter, even though the relevant component is the last, fourth sensor.
That application note prevents a familiar label from being treated as definitive component location. It does not establish the same labeling error on other engines or scan tools.
Confirm identity through the proper diagnostic procedure
The source recommends reconciling fault changes and measuring values when the suspected sensor is disconnected. Such identification work should follow the applicable professional procedure around the exhaust system. This article does not provide hot-exhaust access instructions or a universal sensor resistance. The useful result establishes which sensor and wiring path the code actually concerns before replacement, rather than relying on an ambiguous display name.
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
Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 4
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