‘Check engine’ light. Which octane to use. Electric cars

‘Check engine’ light. Which octane to use. Electric cars

Q: In my car, the look at engine light-weight comes on and then goes off and

Q: In my car, the look at engine light-weight comes on and then goes off and it is now back on.

I experienced a examination finished at neighborhood car-components keep that confirmed a code of PO138. They advised me this signifies a challenge with the oxygen sensor. I changed the oxygen sensor and the mild by no means went out.

I contacted the mechanic that products and services my auto when I simply cannot, and he stated codes don’t generally reveal what is improper. Now what do I do?  

A: Computer system fault codes can sometimes be deceptive, even to the greatest technician.

There is a precise troubleshooting procedure that demands to be adopted for proper analysis and fix. The sensor will hardly ever do the job effectively if the wiring to and from the sensor has a challenge. A technician will typically check out for appropriate voltage and grounds to the sensor. Even a new sensor with a faulty ground circuit will not operate effectively.