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YOUR RESEARCH6 fault codes to interpret - O2 sensors?
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Replace maf sensor, cleared the codes, and am now getting
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Performed · outcome unconfirmed · Original poster
I replaced the MAF sensor, cleared the codes, and am now getting:
Leading evidence: 'Replace maf sensor, cleared the codes, and am now getting' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean 02 plugs' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
I would start with cleaning 02 plugs with electrical cleaner , then if that fails, move towards replacement of all 4 sensors.
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Suggestion · Original poster
I assume the next step is to replace the O2 sensors, but I'm not sure which ones - I am unsure how behind/ahead of cat translate to pre/post cat.
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My 2001 C4 (with 56,000 miles) recently gave me the following codes:
P1118: Porsche fault code 4 - Heating power O2S behind cat. c. bank 2
P0159: Porsche fault code 23 - Sensor ageing behind cat. conv. cylinder (4-6)
P1128: Porsche fault code 360 - Oxygen sensing adaption idle range bank 1
P1130: Porsche fault code 361: - Oxygen sensing adaption idle range bank 1
P01202: Porsche fault code 115 - Mass air flow sensor below limit value
This is the third time I'd had a MAF code and I had been cleaning it to resolve them, but I decided to replace this time with a new Bremi MAF sensor from PelicanParts. The other codes were new and I was unsure if they were related to the MAF issue.
I replaced the MAF sensor, cleared the codes, and am now getting:
P0420: Porsche fault code 40 - exceeds limit value
P1118: Porsche fault code 4 - Heating power O2S behind cat. c. bank 2
P0154: Porsche fault code 18 - O2 sensor ahead of cat. conv. Cylinder (4-6)
P1671: Porsche fault code 407 - Control unit faulty signal implausible
P1128: Porsche fault code 360 - Oxygen sensing adaption idle range bank 1
P1130: Porsche fault code 361 - Oxygen sensing adaption idle range bank 1
I assume the next step is to replace the O2 sensors, but I'm not sure which ones - I am unsure how behind/ahead of cat translate to pre/post cat. Could someone please illuminate me here? Anything else here I am missing or should look at?
I have to take a ~500 mile road trip this weekend; would it be OK to drive the car like this? I assume it'd be inefficient, but I don't know if driving on an uneven mix like this is harmful to the engine. Many thanks!
I would start with cleaning 02 plugs with electrical cleaner , then if that fails, move towards replacement of all 4 sensors.
Driver's side is bank 1 and passenger is bank 2
They can be had for $250 or so (find a Rockauto coupon for a lower price - buy a Bosch or Denso or NTK units only)
https://www.rockauto.com/en/catalog/...2)+sensor,5132
Yes, you can drive it but it may cause some drivability issues as it will run rich and in a safe mode so diminished performance and poor mileage.
