Skip the auto shop - Our mechanics make house calls

Q: Bank 2 Sensor 1 PA03(?) code. Range performance issue?

asked by on

Good day! Having a hell of a few weeks trying to fix my suv to pass emissions. First replaced the bank 2 sensor 1 a few months ago. Light came bank on for bank 2 sensor 2, fixed that. Light immediately came back on for sensor 1 again.. Took it to a highly recommended shop this time and they said it needed to be replaced AGAIN, basically the other mechanic screwed it up and another new part (costing twice as much as first one) needed. So, bank 2 sensor 2 replaced twice. Thought I'd be good to go, but no. Now there's a PA03? code. Something to do with range performance. They checked for leaks, changed MAF sensor, etc.. Check engine light continues to come back on with same code. Help please?! Thank you

My car has 165000 miles.
My car has an automatic transmission.

A: Hello. The code you have provided is not a ...

Hello. The code you have provided is not a valid automotive error code that I recognize. Based on your context I think it may be possible that there is an issue with the signal range of one of your oxygen sensors. If you’ve replaced the sensors then perhaps the issue may be with the wiring. I would carefully examine the wiring to the oxygen sensors, as well as the connector and contacts for any signs of damage, wear, or corrosion. If the sensors and wiring all check out then it may be possible that the issue is with the computer.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Flashing service engine light

If the check engine light starts flashing it can be for many different reasons and all of them can be serious causing the catalyst to get damaged and exceed emission out put from the engine. You could have a misfire...

Q: Engine turns over but does not start

Hi there. When the security icon shows up on the dashboard, a few common faults will cause the security light to remain on and the car not to start. The most common is a worn key, faulty key transponder, security...

Q: Door handles don't work

Hello. If your door handles will not open the vehicle, it may be a mechanical issue within the door handles, or perhaps even a security feature. I would recommend having a professional technician, such as one from YourMechanic, inspect the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...