C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

07 throwing code p0036. Simple o2 sensor swap right?

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Old Nov 4, 2013 | 09:50 AM
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Stuka Bomber's Avatar
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2007 c280
07 throwing code p0036. Simple o2 sensor swap right?

Just want to make sure I'm diagnosing this code properly. Here's what I'm able to find on code p0036:

Possible causes of OBD code P0036
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit open shorted to ground - Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection - Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit - Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit fuse - Faulty Engine Control Module (ECM) The Error code is generally activated on detection of the following conditions: The P0036 is set when the ECM detects an open or shorted to ground condition on the heated oxygen sensor heater circuit.

Want to clarify that bank 1, sensor 2 is the passenger side, post cat sensor as well.

Is this a common code? Anything special to check besides just swapping the sensor?

Thanks guys!
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Old May 6, 2014 | 09:46 PM
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C320
Bank 1 is normally where cylinder 1 is, and it should be the passenger side.
Bank 2 is drivers side.
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Old May 7, 2014 | 06:16 AM
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
OBDII convention states that Bank 1 contains Cylinder 1.

P0036 = HO2S Heater Control Circuit (Bank 1 Sensor 2)

If in-line harness plugs are clean & free from oil the O2 sensor replacement would be prudent.
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Old Aug 25, 2014 | 10:07 PM
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From: Colorado
'03 SL55 AMG | 2021 AMG GLE 63s Coupe
W211 HO2S

Sorry for jumping in here from the W211 world, but when I searched the forums, this was the best hit for my question(s)

P0036 and P0056 are both downstream sensors correct?
(OBD points to Bank 1 Sensor 2 and Bank 2 Sensor 2)

According to https://mbworld.org/forums/c-class-w...7-request.html

P0036 - Heating of component G3/6 (Right O2 sensor, after TWC [KAT]) : Open circuit
P0056 - Heating of component G3/5 (Left O2 sensor, after TWC [KAT]) : Open circuit

...so part number A0015409517 for the post cat ones is what I think needs to be replaced.

Anything "fishy" about both going out at the same time? Is there a fuse specific to them that I should check first, or anything else to check before hunting down the parts and replacing them?

.

Last edited by Honcho; Aug 25, 2014 at 10:12 PM.
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Old Aug 1, 2023 | 01:15 PM
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CLS550
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Last edited by hgoodwiniii; Aug 1, 2023 at 01:17 PM.
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Old Feb 8, 2025 | 09:40 AM
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Originally Posted by hgoodwiniii
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Where you able to get a pcm rebuild or replacement? Where the codes ever cleared?
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Old Feb 9, 2025 | 06:17 AM
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CLS550
Originally Posted by StevenG214
Where you able to get a pcm rebuild or replacement? Where the codes ever cleared?
Yes, I was able to purchase a remanufactured replacement one in 2024. I got it off ebay for $1,150 from a seller named precision_ecu. So far, it's working great. All error codes are gone and it runs well. When I click the product link in my order on ebay, the product page is missing for the price I paid. Looks like you can now find it here:

2007-2011 Mercedes CLS63 AMG (W219) Remanufactured ME9.7 ECM | eBay

The seller still has a presence. Try contacting them. Good luck



Last edited by hgoodwiniii; Feb 9, 2025 at 06:23 AM.
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