O2 Sensors
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C240
O2 Sensors
I think I need to replace the O2 sensors on my 01 C240. I was driving up hill around 60mph when all of a sudden my CEL light came on and I basically lost all horsepower. Car became very very sluggish. I limped the car home and pulled these codes; P0130 (pending), P0150 (pending), P0300, P0302, P0305, and P0306. I was going to buy new plugs and wires along with some O2 sensors for the car. Just wasnt sure how many O2 sensors the car had and where they are located. Do you think this would help? Any info or ideas would be a great help. Thanks.
Last edited by jb0190; Jul 13, 2009 at 07:47 PM.
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
P0130 = O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
P0150 = O2 Sensor Circuit Malfunction (Bank 2 Sensor 1)
The others are misfire codes on those respective cylinders. Suggest you check your fuel filter & pump. Likely need plugs, wires & maybe coilpacks - Check by marking coilpacks & then interchanging to see if misfire changes cylinder. What mileage has the vehicle done?
See pics for O2 sensors. You have 4. O2 sensors have a life of approx 80K miles before they go out of spec & cycle to slowly. - All these problems can be triggered by fuel starvation.
P0150 = O2 Sensor Circuit Malfunction (Bank 2 Sensor 1)
The others are misfire codes on those respective cylinders. Suggest you check your fuel filter & pump. Likely need plugs, wires & maybe coilpacks - Check by marking coilpacks & then interchanging to see if misfire changes cylinder. What mileage has the vehicle done?
See pics for O2 sensors. You have 4. O2 sensors have a life of approx 80K miles before they go out of spec & cycle to slowly. - All these problems can be triggered by fuel starvation.
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C240
Car has around 126K miles. I have never changed the plugs or wires in the 4 yrs I have owned the car. Could that affect the O2 sensors, or should I change those as well? If you so, all 4, or just the 2 that have thrown codes? Should I be concerned with the MAF sensor? Thanks for the help
Last edited by jb0190; Jul 13, 2009 at 08:29 PM.
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Joined: Jun 2008
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
It's time to change everything. Start with Plugs, fuel filter, wires. Clean the MAF - it might be just fine. Once you have done these - cancel all codes & see what returns. You might get lucky for a while but the O2 sensors will be lazy if they have never been replaced. Only replace coils if one has failed. I've seen coils go a long way - I have also seen failures around 100K so it's luck of the draw. The 6 Cyl engines are bullet proof. Keep an eye on the CPS (Crankshaft Position Sensor)
Thread Starter
Newbie
Joined: Apr 2009
Posts: 12
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C240
I already replaced the crankshaft and camshaft position sensors. Thanks for the info. I guess Ill start by ordering plugs and wires. Any suggestions? Where would I find the MAF sensor and how should I go about cleaning it. Thanks again.
