I just had it smogged, and it was double what the emmissions are aloud to be here in California.
2007-04-05 09:40:14 · 5 answers · asked by redsprettygirl 2 in Cars & Transportation ➔ Maintenance & Repairs
When O2 sensors fail, they read in favor of a lean condition which the computer tries to correct by adding more fuel. If your engine is running properly (no miss-fires) you best have the O2 sensors checked properly (with a scan tool) to make sure wiring or other problems in the system is not creating this condition.
2007-04-05 09:57:23 · answer #1 · answered by Lab 7 · 1⤊ 0⤋
O2 Sensor? Probably NOT the problem.
People like to blame the O2 sensor for the problem because that's where the computer fault appears.
However, nine times out of ten, it's not faulty. It is simply reading a condition in the engine that is causing it to send a signal to the computer that there is a fault in the exhaust emissions mixture.
In a V-8 engine if you have a fouled spark plug, the air/fuel won't ignite and cause a rich condition in the exhaust which the O2 sensor reads.
So, there's 8 possible causes.
Loose spark plug wire 8 more possible causes.
Faulty injector? 8 more possible causes.
Vacuum leak? 8 more.
So, there's 32 possible problems that could cause the O2 sensor to trip the computer. Not to mention fuel supply issues, timing, EGR, bad gas, rotor, distributor cap,
Before you yank the O2 sensor and replace it, check the basics first. Otherwise, you could have wasted time and money on the result, not the cause
2007-04-05 09:49:57 · answer #2 · answered by Mr. KnowItAll 7 · 1⤊ 0⤋
Well you know what they say, if you gotta ask....
If they use regular (eg Bosch) sensors, not too much.
The sensors themselves could be anywhere from $60 to close to $200. For a Bimmer, probably closer to the high side.
Price them at an auto parts store...
2007-04-05 09:47:59 · answer #3 · answered by Wil T 3 · 0⤊ 1⤋
LAB has it dead on, and he is a smog tech in Canada.
I recommend that you actually ask for proper diagnostics before dumping money for something that may not repair your problem.
2007-04-05 10:03:13 · answer #4 · answered by Ironhand 6 · 1⤊ 0⤋
it shouldnt cost much. and you can replace it easily at home to save money. buy the part and have them show you where it is on the car.
2007-04-05 09:45:41 · answer #5 · answered by Anonymous · 0⤊ 1⤋