What does code P1183 mean?

Q: What does code P1183 mean?

Linear Oxygen Sensor Reference Voltage Short To B+. P1183 on Volkswagen vehicles means the engine control module (ECM) has detected a short to battery voltage on the reference voltage circuit of a linear oxygen sensor, which is the wideband air-fuel ratio sensor. The ECM expects a stable, low reference voltage on that wire, but it is seeing battery voltage instead, so it cannot trust the sensor's signal and sets this fault.

DTC codes / Volkswagen codes / P1183

P1183 · VolkswagenLinear Oxygen Sensor Reference Voltage Short To B+

P1183 on Volkswagen vehicles means the engine control module (ECM) has detected a short to battery voltage on the reference voltage circuit of a linear oxygen sensor, which is the wideband air-fuel ratio sensor. The ECM expects a stable, low reference voltage on that wire, but it is seeing battery voltage instead, so it cannot trust the sensor's signal and sets this fault.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyProfessional

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.