Q: Error codes P0131 and P0151
I have error codes P0131 and P0151. The definition I'm given for P0131 is "Bank 1 Sensor 1 O2 electrical circuit signal had low voltage for a predetermined period of time". There is no definition given for P0151. Under "error codes read" section I'm given: "P0131 HO2S-11 (bank 1 sensor 1) circuit low input (lean shift)" and " P0151 O2 circuit low voltage (bank 2 sensor 1)". I understand the sensor 1 means it is before the cat converter. I also understand the bank 1 and bank 2 being the different sides of the engine. Question 1 is, what is the difference between "circuit low input (lean shift)" and "circuit low voltage" ? Are these different or similar problems? Question 2 is, is it unusual for both sensors to come up bad at once, or does it point to there being a problem somewhere else that is effecting both sensors?
My car has 254000 miles.
My car has an automatic transmission.
Hi there:
It would be best for you to review these two links; the first describes what the P0151 OBD-II Trouble Code is and what typically causes it, and second, the P0131 code and what it means.
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