What does code P1190 mean?

Q: What does code P1190 mean?

Linear Oxygen Sensor Reference Voltage Incorrect Signal. P1190 on Volkswagen vehicles means the engine control module (ECM) has detected that the reference voltage signal from the linear oxygen sensor (also called a wideband or air-fuel ratio sensor) is outside the expected range or is not responding correctly. The ECM monitors this voltage to accurately measure the air-fuel ratio, and an incorrect signal prevents proper fuel control. This code typically points to a fault in the sensor's reference circuit, the sensor itself, or its wiring.

DTC codes / Volkswagen codes / P1190

P1190 · VolkswagenLinear Oxygen Sensor Reference Voltage Incorrect Signal

P1190 on Volkswagen vehicles means the engine control module (ECM) has detected that the reference voltage signal from the linear oxygen sensor (also called a wideband or air-fuel ratio sensor) is outside the expected range or is not responding correctly. The ECM monitors this voltage to accurately measure the air-fuel ratio, and an incorrect signal prevents proper fuel control. This code typically points to a fault in the sensor's reference circuit, the sensor itself, or its wiring.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering

Guidance is general and written for Volkswagen vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.