Should I replace my MAF or O2 sensors?
07-24-2009, 10:46 AM
#1
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Thread Starter
Should I replace my MAF or O2 sensors?
Got a CEL and finally got around to pulling the codes. They're
P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
P0150 O2 Sensor Circuit Malfunction (Bank 2 Sensor 1)
P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
And there's a rough idle...
I've already changed the pre-cat sensors. Do these codes mean that I've to change the post cats now?
TIA
P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
P0150 O2 Sensor Circuit Malfunction (Bank 2 Sensor 1)
P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
And there's a rough idle...
I've already changed the pre-cat sensors. Do these codes mean that I've to change the post cats now?
TIA
07-25-2009, 10:47 AM
#4
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C43 AMG & E55 AMG
02 sensors cheaper then maf?
lol..
cost me 250$ each and there is 4 of them to change
maf goes for 500$ ~
ok that is quebec price..u guys in the states running a c43 is like a honda civic price so i don't know
lol..
cost me 250$ each and there is 4 of them to change
maf goes for 500$ ~
ok that is quebec price..u guys in the states running a c43 is like a honda civic price so i don't know
07-25-2009, 01:58 PM
#5
MBWorld Fanatic!
Got a CEL and finally got around to pulling the codes. They're
P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
P0150 O2 Sensor Circuit Malfunction (Bank 2 Sensor 1)
P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
And there's a rough idle...
I've already changed the pre-cat sensors. Do these codes mean that I've to change the post cats now?
TIA
P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
P0150 O2 Sensor Circuit Malfunction (Bank 2 Sensor 1)
P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
And there's a rough idle...
I've already changed the pre-cat sensors. Do these codes mean that I've to change the post cats now?
TIA
07-25-2009, 02:29 PM
#7
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07-26-2009, 12:27 AM
#8
MBWorld Fanatic!
O2 sensor are normal wear items. For my car, a Bosch universal fit, 4-wire O2 sensor is Bosch part number 15736 ($85) for the downstream and Bosch part number 15733 ($67) for the upstream. A C43 has ME 2.0 so it takes a Bosch 15738 in all four locations (same as a ME 2.0 CLK430). No idea what they cost or the best place to buy them, but they're on Amazon dot com for $65. They may be cheaper elsewhere. $250 versus $65, times four - I'd crimp some wires.
07-27-2009, 01:40 AM
#9
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Hello There!
This is Biitz from Canada!
Im new on this forum!
I'm not a tech so I cant speak on codes but from a parts person the 02 sensor is a cheaper fix than an air-mass.
I will also ask my friends about that!
Thank's!....
This is Biitz from Canada!
Im new on this forum!
I'm not a tech so I cant speak on codes but from a parts person the 02 sensor is a cheaper fix than an air-mass.
I will also ask my friends about that!
Thank's!....
07-28-2009, 02:15 PM
#10
Super Member
Thread Starter
ok, tks for the replies. When I get back from vacation I'll order and install the sensors. In the meantime I'm driving the E
...I miss the C...
...I miss the C...
10-03-2009, 06:54 PM
#11
Super Member
Thread Starter
So I should change my MAF now?
Man it felt good to drive the C'; feels good after it's been sitting for two months.
10-03-2009, 10:55 PM
#12
MBWorld Fanatic!
So I finally got around to changing the post cat sensors today. Two of the codes are gone but I'm still getting P0150 O2 Sensor Circuit Malfunction (Bank 2 Sensor 1) P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1).
So I should change my MAF now? Man it felt good to drive the C'; feels good after it's been sitting for two months.
So I should change my MAF now?
Man it felt good to drive the C'; feels good after it's been sitting for two months.
10-04-2009, 11:31 AM
#13
Super Member
Thread Starter
On a US spec OBDII car, the O2 sensor before a cat is referred to as sensor 1 (sensor in the 'one' position). The sensor after a cat is referred to as sensor 2. It sounds like you changed your "sensor 2" O2 sensors. That should have cleared any sensor 2 issues. However, your error is for an O2 sensor in the 'sensor one' position - before the cat . Did you change those as well?
Could it be that one of the sensors I changed back in April went bad already...
Last edited by trinitony; 10-04-2009 at 11:33 AM.
10-04-2009, 09:57 PM
#14
MBWorld Fanatic!
It may be bad now, but it's unnatural for an O2 sensor to wear out in a couple of months. If it's busted now, it may have been defective when you bought it.
Personally, I'd swap it with another sensor and see if the code follows then sensor. All four O2 sensors on an ME 2.0 engine are the same, so swap it with a downstream sensor. If you get a new code stating heating element in the new location is bad, then the heating element or the wiring on the O2 sensor side of the plug has died. If the problem stays in the original location, the wiring harness or plug on the engine side may be defective.
Are they universals? If so, did you crimp the wires or solder them? If you soldered them, try crimping them. I NEVER solder O2 sensor wires. That's not saying that it can't be done, just that I won't.
Personally, I'd swap it with another sensor and see if the code follows then sensor. All four O2 sensors on an ME 2.0 engine are the same, so swap it with a downstream sensor. If you get a new code stating heating element in the new location is bad, then the heating element or the wiring on the O2 sensor side of the plug has died. If the problem stays in the original location, the wiring harness or plug on the engine side may be defective.
Are they universals? If so, did you crimp the wires or solder them? If you soldered them, try crimping them. I NEVER solder O2 sensor wires. That's not saying that it can't be done, just that I won't.
10-05-2009, 07:25 AM
#15
Super Member
Thread Starter
It may be bad now, but it's unnatural for an O2 sensor to wear out in a couple of months. If it's busted now, it may have been defective when you bought it.
Personally, I'd swap it with another sensor and see if the code follows then sensor. All four O2 sensors on an ME 2.0 engine are the same, so swap it with a downstream sensor. If you get a new code stating heating element in the new location is bad, then the heating element or the wiring on the O2 sensor side of the plug has died. If the problem stays in the original location, the wiring harness or plug on the engine side may be defective.
Are they universals? If so, did you crimp the wires or solder them? If you soldered them, try crimping them. I NEVER solder O2 sensor wires. That's not saying that it can't be done, just that I won't.
Personally, I'd swap it with another sensor and see if the code follows then sensor. All four O2 sensors on an ME 2.0 engine are the same, so swap it with a downstream sensor. If you get a new code stating heating element in the new location is bad, then the heating element or the wiring on the O2 sensor side of the plug has died. If the problem stays in the original location, the wiring harness or plug on the engine side may be defective.
Are they universals? If so, did you crimp the wires or solder them? If you soldered them, try crimping them. I NEVER solder O2 sensor wires. That's not saying that it can't be done, just that I won't.
Thanks!
Last edited by trinitony; 10-05-2009 at 03:14 PM.
10-05-2009, 06:25 PM
#16
MBWorld Fanatic!
They're bosch so no crimping as they were completes. I'll swap them around and see what happens. And GLAD to know that they're all the same. So basically it's the wire lengths that determine where they go then. Have there been reports of wiring harnesses going bad?
Thanks!
Thanks!
10-05-2009, 11:09 PM
#17
Super Member
Thread Starter
As I was about to switch the connections around, I notice one of the upstream connectors was pretty loose. And it was almost like the femal side of it was protruding back. I put them all in snug, reset set the code and drove around for 15 minutes. No light as yet and the car runs smoothly. Will report back tomorrow. Man how I wish I had a lift....
10-06-2009, 08:29 AM
#18
Super Member
Thread Starter
kool....
As I was about to switch the connections around, I notice one of the upstream connectors was pretty loose. And it was almost like the femal side of it was protruding back. I put them all in snug, reset set the code and drove around for 15 minutes. No light as yet and the car runs smoothly. Will report back tomorrow. Man how I wish I had a lift....
As I was about to switch the connections around, I notice one of the upstream connectors was pretty loose. And it was almost like the femal side of it was protruding back. I put them all in snug, reset set the code and drove around for 15 minutes. No light as yet and the car runs smoothly. Will report back tomorrow. Man how I wish I had a lift....
