Oxygen Sensor

[roadrat57]

Purchased 2008 v-10 Ford class A with 30,000 miles. Dealership replaced oxygen sensor before delivery. 800 miles later, check engine light is back on. Diagnostics determined another oxygen sensor failure. Shop said there are four of them. Question...is 30000 about the time they start to fail?

Thanks for your response.

p.s. - Cost will be $250

[Chum_lee]

roadrat57 wrote:
Purchased 2008 v-10 Ford class A with 30,000 miles. Dealership replaced oxygen sensor before delivery. 800 miles later, check engine light is back on. Diagnostics determined another oxygen sensor failure. Shop said there are four of them. Question...is 30000 about the time they start to fail?

Thanks for your response.

p.s. - Cost will be $250

The OEM 4 wire heated sensors should be good for +- 100,000 miles given no other faults. Use only OEM quality sensors. Bosch, Delphi, or Denso are best. (Motorcraft supplies but doesn't make sensors) A universal fit O2 Bosch sensor can be had for about $35.00 each. If a replaced (new OEM) sensor fails or promptly throws a code most likely there's another issue which should be investigated.

Chum lee

[crasster]

Go on Ebay and check out some from China. If it's not a native Denso sensor it may work just fine with yours. They should be like $25 or less on Ebay from China. They are fine on American engines.

[roadrat57]

Thank you all for your input.

Roadrat

[Dannyabear1]

Some fuel additives will kill o2 sensors

[shepfly]

If your handy I would buy the socket and do a search online for the sensors, and save yourself a wad of money. There is more than one manuf.of what you need, they even have wiring connection kits to match your stock wiring harness. Good luck, Dave

[ArchHoagland]

Why do you think the O2 sensor is bad?

Perhaps it is doing what it is supposed to do...tell you when your air to fuel mixture is bad and polluting the air.

I too had O2 sensor Check Engine Light problems and replacing the O2 sensor didn't cure the problem. Cleaning the MAF (Mass Airflow Sensor) corrected the problem.

So I'd suggest a $10 can of MAF cleaner might help you out.

[roadrat57]

Thanks jfkmk!

[jfkmk]

The diagnostic should tell you which sensor failed. If you don't have a scan tool, they're fairly cheap. Also, spring for an o2 sensor wrench, they're well worth it!

[roadrat57]

I can work on cars. My question is, how do I know which sensor to replace? I would tend to replace the forward two without a diagnostics reading.

[azrving]

.

[K_Charles]

They should last longer then that but they only cost about $80.00 and you can change them in about 10 min with one wrench.

[1492]

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