P0138 O2 Sensor Circuit High Voltage Bank 1 Sensor 2 If you have a dtc of p0138, it’s indicating a problem with high voltage in an oxygen sensor monitors the oxygen levels in the exhaust gases for bank 1, sensor 2. that sensor’s location can vary from vehicle to vehicle. sensor 2 means it’s the downstream sensor – the one after the catalytic converter. bank 1 indicates it’s on the side. How to fix a p0138 engine code: o2 sensor circuit high voltage bank 1 sensor 2the computer (ecm pcm) uses the upstream o2 sensor 1 to modify the air fuel mix.
Causes And Fixes Toyota P0138 Code O2 Sensor Circuit High Diagnostic trouble code (dtc) p0138 stands for “o2 sensor circuit high voltage (bank 1, sensor 2)”. the code is logged once the pcm detects that the voltage signal from the rear o2 sensor is too high for a given time. although the p0138 code often appears due to a worn out oxygen sensor, it’s not the only condition that can trigger this. I also look at some symptoms you might notice and outline a few of the best fixes. code p0138 definition. p0138 – o2 oxygen sensor circuit high voltage (bank1, sensor2) what does the p0138 code mean? the p0138 dtc is a generic trouble code that says the oxygen sensor circuit (bank 1, sensor 2) is exhibiting higher voltage than normal. Check the o2 sensor voltage: using a multimeter, check the voltage output of the o2 sensor. the voltage should be between 0.1 and 0.9 volts. if the voltage is higher than 0.9 volts, then it indicates an issue with the o2 sensor. inspect the wiring: check the wiring of the o2 sensor for any damage or corrosion. 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. p0138 causes. faulty o2 sensor; short to battery voltage in o2 sensor signal circuit; corroded wiring.
Causes And Fixes P0138 O2 Sensor Circuit High Voltage Bank 1 Sensor 2 Check the o2 sensor voltage: using a multimeter, check the voltage output of the o2 sensor. the voltage should be between 0.1 and 0.9 volts. if the voltage is higher than 0.9 volts, then it indicates an issue with the o2 sensor. inspect the wiring: check the wiring of the o2 sensor for any damage or corrosion. 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. p0138 causes. faulty o2 sensor; short to battery voltage in o2 sensor signal circuit; corroded wiring. Cause #1: short in the o2 sensor signal circuit. this is the first thing you need to check. short to battery voltage in the o2 sensor signal circuit will make the sensor’s output voltage increase, triggering p0138. if the wiring is the problem, there is no symptom other than the check engine light. this is because downstream o2 sensors are. P0138 is a diagnostic trouble code (dtc) for "o2 sensor circuit high voltage (bank 1, sensor 2)". this can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. our certified mobile mechanics can come to your home or office to perform the check engine light diagnostic.
P0138 02 Sensor Circuit High Voltage Bank 1 Sensor 2 Ca Cause #1: short in the o2 sensor signal circuit. this is the first thing you need to check. short to battery voltage in the o2 sensor signal circuit will make the sensor’s output voltage increase, triggering p0138. if the wiring is the problem, there is no symptom other than the check engine light. this is because downstream o2 sensors are. P0138 is a diagnostic trouble code (dtc) for "o2 sensor circuit high voltage (bank 1, sensor 2)". this can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. our certified mobile mechanics can come to your home or office to perform the check engine light diagnostic.
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