How do I fix error 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.
Can you drive with a P0138?
What Does Code P0138 Mean? Issue Severity: MODERATE – Extended driving with this code can cause internal engine damage.
What causes 02 sensor high voltage?
Faulty oxygen sensor. A rich running condition caused by a fuel delivery issue (e.g., excessive fuel pressure) Damaged wiring or connections. A problem with the PCM, such as software in need of an update.
Can a bad catalytic converter cause a P0138?
While it’s common for the HO2S to wear out over time, there are a number of other issues that trigger a P0138 diagnostic code and have nothing to do with the oxygen sensor. These include: An inefficient catalytic converter. Engine vacuum leaks that create a lean exhaust condition.
What can cause oxygen sensor fault code?
Why do O2 sensors fail? Since the oxygen sensor is in the exhaust stream, it can become contaminated. Common sources of contamination include an excessively rich fuel mixture condition or oil blow-by in an older engine and engine coolant being burnt in the combustion chamber as a result of an engine gasket leak.
Will the check engine light come on if there is a vacuum leak?
Vacuum leak symptoms Symptoms of a vacuum leak include the Check Engine light, rough idle, stalling and a hissing sound coming from the engine bay. The engine may run well at higher RPMs, but surges, runs rough and struggles to maintain stable RPMs at idle. Often, the engine stalls when stopping.
What does a car do when the oxygen sensor is bad?
When an O2 sensor goes bad, it can no longer trigger accurate fuel injection levels, regulate exhaust gas, or ensure efficient fuel combustion. Consequently, the vehicle may release harmful environmental pollutants or carbon-based compounds – in addition to having subpar engine performance.
How do you find a vacuum leak in water?
Scope out all the vacuum lines under the hood. Then start the engine and spray each connection with a light stream of water. If a connection sucks in the water, you’ve found your leak. A vacuum leak can cause a rough idle, high rpm, poor gas mileage and even trigger a check-engine light.