Q: Oxygen sensor bank 1 sensor 1

asked by on July 20, 2017

Oxygen sensor bank 1 sensor no access on 2003 grand marquis Cant barely fit my hand or any tools to remove and replace sensor the catalytic conver is just in the way

My car has 140000 miles.
My car has an automatic transmission.

Oxygen Sensor Replacement $123.80 - $932.74 Get a Quote

Hi there. Getting to the O2 sensors are tricky without removing some additional components or using specialty tools. You might want to have a professional mobile mechanic come to your location and complete an O2 sensor replacement to help you. However, in many cases, what is commonly diagnosed as an O2 sensor problem is actually the electrical harness that connects the sensor to the ECU or other component. It might be best to replace the harness and sensor.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Broken speedometer
Hi. The most common problem is the instrument cluster followed by the vehicle speed sensor on the transmission/transfer case(2wd/4wd). You will have to use a scan tool to determine if the VSS signal is reaching the instrument cluster. If you...
Just changed timing belt, starts wont stay on in idle, give it gas and it shuts off, HELP PLEASE..!!
When you damaged the belt and turned on the motor you most likely bent the valves. This is an interference motor, meaning that the pistons and the valves can occupy the same space, just not at the same time. If...
Engine Oil
It is a bit unclear what the question is but assuming you are looking for an oil recommendation, it would depend on the driving habits and conditions the truck is subjected to. Since it has been 28k miles since the...
Slow/no acceleration...High RPMs...No engine light
I do see that there are a couple of different Technical Service Bulletin's (https://www.yourmechanic.com/article/how-to-use-a-technical-service-bulletin-by-parker-hill) (TSB's) that may be associated with your 2007 Dodge Charger. I would first contact the dealership to verify whether or not the issue would be covered....
Why does my steering wheel vibrate when I'm driving. Please help, me I'm very concerned and worried.
Hi there. There are typically two items that cause the front end or steering wheel to vibrate while you're driving. If the vibration occurs below 40 MPH, it's usually an indication that a front end suspension component, such as CV...
Timing Belt interval
From the information that I have acquired, it looks like the interval for changing your timing belt (https://www.yourmechanic.com/services/timing-belt-replacement) is either 75,000 miles, or 5 years, whichever occurs first. With that stated, I would recommend getting your timing belt replaced as...
P0605 & p2105
Hello, thank you for writing in. Lets take a look at these codes separately at first. The P0605 codes stands for a malfunction with the main computer's (PCM-power train control module) ROM (or "Read Only Memory"). The P2105 is then...
Ignition
Hi there. Unfortunately, we're not able to post images in the Q & A; which is why purchasing a service and repair manual for your Honda Odyssey would be very helpful in explaining how the ignition system works and is...
My car at 70 mph reads 3000 rpms. Is that normal because it is burning gas too fast? 2002 Plymouth Neon
Hello - check first to be sure you have the gear shifter in the "D" position, NOT in the "3" position. This ensure engagement of "Overdrive". Your car has a 4-speed transmission, plus overdrive. If you listen carefully, while accelerating...

Related articles

Mercury Certified Pre-Owned (CPO) Car Program
Drivers Drivers who are shopping around for a used Mercury vehicle may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on to...
How to Replace an Ambient Temperature Sensor
The ambient temperature sensor monitors the car's temperature inside and out. This sensor allows the AC to maintain comfortable cabin temperatures.
How to Replace a Coolant Level Sensor
Coolant level sensors are faulty if the coolant level sensor light stays on extensively or the engine overheats without the light coming on.