TuningBot DTC Database · v4.37.15
6 manufacturer-specific interpretations across 5 manufacturers in the TuningBot DTC database.
FordThe control module detected a fault associated with the Exhaust Not Warm Enough Downstream O2 Sensor Not Tested circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Ford.
Engine not running long enough prior to self - test
KiaThe control module detected a fault associated with the Long Term Fuel Trim Multiplicative Air System Low circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Kia.
LexusThe control module detected improper operation of the Throttle actuator control (TAC) power source circuit. This is the manufacturer-specific definition used by Lexus.
PorscheThe control module detected a fault associated with the Oxygen Sensing circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Porsche.
VAGThe control module detected that the air-fuel mixture stayed richer than the target despite full corrective control (Long term fuel trim, entire speed/load range, Bank 1 - system). This is the manufacturer-specific definition used by Audi.
The control module detected that the air-fuel mixture stayed richer than the target despite full corrective control (Long term fuel trim, system). This is the manufacturer-specific definition used by Volkswagen.
Powertrain: engine, transmission and driveline systems.
Manufacturer-defined range: the meaning can differ between brands.
Specific fault index within the subsystem.
Diagnostic Trouble Code (6 interpretations). The control module detected a fault associated with the Exhaust Not Warm Enough Downstream O2 Sensor Not Tested circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Ford.
P1127 is a manufacturer-specific code. In this database it is documented for: Ford, Kia, Lexus, Porsche, VAG. The same number can mean something different on other brands.
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
Understand the system behind this code: Oxygen Sensors (Lambda)
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