Is P0138 code upstream or downstream?
Code P0138 is set when the downstream sensor sends too high of a voltage signal for an extended period of time.
How do I fix code P0138?
What repairs can fix the P0138 code?
- Replacing the O2 sensor for bank 1 sensor 2.
- Repairing or replacing the wiring or connection to the O2 sensor for bank 1 sensor 2.
- Replacing the catalyst in front of the sensor.
- Repairing a leaking injector.
What code is for downstream O2 sensor?
When it detects a problem in the heater circuit for the engine bank 1’s downstream oxygen sensor, it switches on the check engine light and logs the P0141 code.
What should a downstream O2 sensor read?
The Downstream Oxygen Sensor (Oxygen Sensor 2) Therefore, the downstream oxygen sensor (sensor 2) should produce a steady voltage of approximately 0.45 volts.
What causes code P0138?
When trouble code P0138 is set, this indicates that there is a high voltage (steadily above . 9 volts) for more than 10 seconds indicating a lack of oxygen in the exhaust stream and an abundance of fuel at sensor 2 on the bank 1 of the engine.
What does error code P0138 mean?
What can a bad downstream O2 sensor cause?
As your oxygen sensor is going bad you may notice your vehicle is running rough, misfiring or running irregularly while idling. You may also observe other engine performance problems, such as loss of power, hesitation, or stalling.
What causes engine code p0138?
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. Possible Symptoms Engine Light ON (or Service Engine Soon Warning Light)
Where is the bank 1 sensor 1 oxygen sensor located?
Bank one is the engine cylinder bank near the engine firewall (see diagram). The bank one sensor one is the Oxygen sensor (O2) located in the exhaust pipe just of the engine cylinder bank at rear and before the Catalytic Converters .
What does Bank 2 sensor 2 oxygen sensor do?
O2 sensors on a specific bank marked as “sensor 2” (as this one is) are used to monitor emissions. A Three-Way Catalyst (TWC) system (catalytic converter) is used to control tailpipe emissions. The PCM uses the signal received from Oxygen sensor 2 (#2 indicates aft of catalytic converter, #1 indicates pre-converter)…
Which sensor is Bank 1 sensor 1?
Bank 1 Sensor 1 is a sensor that is used by the computer (ECM) to monitor the amount of oxygen exiting the engine. The ECM uses the signal from the O2 sensor to adjust the fuel and air ratio of the engine.