What causes an O2 sensor code?
Deceptive Oxygen Sensor Codes Engine vacuum leaks that create a lean exhaust condition. Mass airflow sensor failure that creates a rich exhaust condition. Manifold air pressure sensor failure that creates a rich exhaust condition. A defective fuel pressure regulator.
What does code p0138 on O2 sensor mean?
A code P0138 may mean that one or more of the following has happened: 1 Faulty O2 sensor 2 Short to battery voltage in O2 sensor signal circuit 3 High fuel pressure (not as likely)
What does p0138 mean on a Jeep Wrangler?
Users have reported P0138 for the following makes: Jeep (especially on a Jeep Wrangler), Dodge, Toyota, Nissan, and Chevrolet. Code P0138 means that your powertrain control module (PCM) has detected that the voltage signal from the rear O2 sensor is too high. What is an Oxygen Sensor? All modern cars have at least two oxygen sensors.
What is the diagnostic code for O2 sensor circuit Bank 2?
P0138 is a diagnostic trouble code (DTC) for “O2 Sensor Circuit High Voltage (Bank 1, Sensor 2)”.
What does the code p0138 on a boxer engine mean?
Code P0138 is set when the downstream sensor sends too high of a voltage signal for an extended period of time. The bank one portion of the code indicates that the issue is on the side of the engine that houses the number one cylinder (only applies to engines with a ‘V’ or boxer configuration).
When is the p0138 O2 sensor code detected?
When is the code detected? The P0138 code is set when the Engine Control Module (ECM) detects that the rear O2 sensor signal voltage remains excessively high for an extended period of time. The Heated Oxygen Sensor 2 (HO2S) (Rear O2 Sensor), after three-way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank.
Users have reported P0138 for the following makes: Jeep (especially on a Jeep Wrangler), Dodge, Toyota, Nissan, and Chevrolet. Code P0138 means that your powertrain control module (PCM) has detected that the voltage signal from the rear O2 sensor is too high. What is an Oxygen Sensor? All modern cars have at least two oxygen sensors.
Code P0138 is set when the downstream sensor sends too high of a voltage signal for an extended period of time. The bank one portion of the code indicates that the issue is on the side of the engine that houses the number one cylinder (only applies to engines with a ‘V’ or boxer configuration).
P0138 is a diagnostic trouble code (DTC) for “O2 Sensor Circuit High Voltage (Bank 1, Sensor 2)”.