Q: Check engine light is on for a O2 Sensor-high voltage

asked by on

My check engine light on, Regarding O2 electrical circuit signal had high voltage for a predetermined period.
My car has an automatic transmission.

Hello. Usually a high-voltage O2 sensor check engine light code will be caused by a faulty O2 sensor itself. Though at times it can be caused by other issues such as shorted wiring, a leaking vacuum line, or even a leaking fuel injector. Most likely the O2 sensor itself is at fault, but I suggest that you have a technician evaluate your vehicle to ensure that it is the O2 sensor so we can prevent reoccurring headaches. We will send you an estimate for the replacement of your sensor as well as an estimate for diagnosing your check engine light. The technician will diagnose this issue both visually and with a scan tool.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Check engine light is on for a O2 Sensor-high voltage

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I took it to get a car wash and after the car wash, the car engine sound like I was

Hi Cesar. Thanks for contacting us tonight. Most of the time, when engine RPM rises higher than normal, it's caused by a loose or damaged vacuum line connection. If you pressure washed the engine at the car wash, this could...

Q: Problem with battery discharging over a couple of hours. Alternator getting hot while running very quickly.

This may be related to a voltage regulator malfunction. This is the resister on the passenger fender well that you are referring to. This is a device that monitors the charging system to be sure the battery is charged at...

Q: Q: Check engine light on.

The testing you did using the CIL may not have been done correctly. During these tests you will need to cycle the clutch and accelerate the engine when the separator codes were received. This is done with a superstar 2...

Related articles

P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.