Where and what is the sensor behind Mode $06 Component Id $05 TID $01?

The car: 2006 Boxster S with 136,000 miles. Running perfectly fine overall. Only tracked once over 10 years ago; otherwise, it's my daily driver -- a mix of highway and stop-and-go during the week, long drives up in the hills on the weekends. The issue: * I get a CEL from a failure on "Mode $06 Component Id $05 TID $01". According to the OBDII app I have, the minimum value of this parameter is 2048, with no maximum. * The failure is intermittent: sometimes it's around the 1200 - 1500 range, and frustratingly sometimes it fixes itself and is in-spec (2443 was one reading) * I've noticed it can stay fixed and/or fix itself when it's relatively cool weather (low 50's F), or paradoxically when it's really hot out -- in the 90's * It can sometimes stay fixed long enough to go through a whole drive cycle, thus clearing the CEL. Indeed, when I reset all the CEL codes with my OBDII reader I can often get through a drive cycle and the code/parameter/CEL stays in-spec for quite a few miles/days * The only info on this code I've been able to find (searching the internet -- nothing came up on this or other Porsche forums) is from a manual from a 911 Carrera , saying the code is used for "measuring the aging of the catalytic converters". I haven't been able to confirm if this is the same setup for a 2006 Boxster S . * My mechanic believes the only way to really fix this is to replace the corresponding cat's Bank. (And I can't say he's wrong -- the car is 19 years old, after all; but naturally before I drop $$$$ I want to know more.) My hypothesis (and hope): the intermittent nature of this parameter going in-and-out-and-back-in spec. could simply mean that some (relatively low cost) sensor in-or-around the cat bank needs to be replaced -- or even just removed and cleaned. So back to the question posed in the title of this post: Where and what is the sensor behind Mode $06 Component Id $05 TID $01? Help!

What's the app you're using? Sounds like it's one that is not capable of reading Porsche codes properly, which is very common - without a Porsche -capable one, the codes don't come through properly, and could even be wrong. I'd recommend getting one that can read Porsche codes properly... there are many options, and some are "free" and others are quite reasonably priced ( ThinkDiag looks good, I have a Foxwell ). If you can tell us where you are, you may be near someone who has a device to borrow as well...

Thanks for the code reader recommendations, schwinn! I'm currently using the OBDLink LX, and I'm very happy with it overall. But alas, it only reports this parameter's current value and its minimum threshold with no other context. Here is the larger issue: my current mechanic, and the prior one (since retired) both have/had the official Porsche laptop, and they both claimed they don't know exactly what this parameter is about, where it's measured, etc. It's just "about the cat bank". Both mechanics have been honest with me over the years and/or I've been a steady repeat customer for them, so they have no reason to lie to me. However, I also have to wonder if they had to sign an NDA or something not to reveal too much, because they are so experienced and/or the Porsche laptop has to give more data than "cat is bad, replace it". Right???? It just doesn't make sense that the nature of this parameter and its corresponding sensor is a complete unknown.

Did either mechanic plug their PIWIS clone into the car and actually scan it for stored error codes? If the CEL is lighting up there ARE codes stored that will go a long way toward diagnosing the issue. Off the top of my head - this sort of thing has happened when cats get old (in miles, not age, and you're don't have that many miles on them.. I'm talking around 200,000 or so..) or the cat gets contaminated (any oil with a high anti-wear additive package) or from bad injectors, or constant oil fumes. OR it might be one of the 4 O2 sensors that are in the car. Get the correct diagnostics tool ( Foxwell NT530 is good and a lot of us have one so we can walk you through using it..), read the codes, come back with them and we might be able to help out. I'd avoid Facebook 987 groups - the advice given is often quite sketchy or wrong or for some other car. And meantime: Welcome to Planet-9, the Friendy Porsche Forum for guys staring at CELs in dread of emptying their wallets.. It's pretty much a tradition here - you get your first question post free because you're panicking and searching the web and we popped up.. but.. we really like people to introduce themselves and their cars (with photos please!) and we have a dedicated place to do this: https://www.planet-9.com/forums/ - lots of fine examples there.. and some sticky threads at the top of the forum that are worth reading, gives you an idea of how to use Planet-9, what we're about and how to do things here.. Let us know what the codes are after you get your Porsche specific code reader.

Thanks for your inputs, deilenberger ! The original question remains: Where and what is the sensor behind Mode $06 Component Id $05 TID $01?

That error message seems incorrect or incomplete, that's why we didn't answer it... you need to get the proper read from the car. PIWIS can do this, if it's up to date. If not, get a proper reader and it will get you the correct code. What you have right now is not something I would believe or depend on.

Many of us here have been using diagnostic tools on our Porsches for some years, I own 4 of them. NONE of them use that sort of messaging. The code isn't a Porsche code so we won't get anywhere with it.. What are we to assume "Component id $05 TID $01" is if it appears in no official or unofficial table of Porsche error codes? We have tables here online of ALL the official Porsche error codes for the 987 series cars - and not one of them looks anything like the code you're giving, so any answers will be guesswork. BTW - I'll ask again - did either of your mechanic friends who own PIWIS clones hook them up to your car and scan for codes? I have to assume not - and since they didn't recognize that code/format they weren't able to help you.

Apologies -- the "upper level" code is the infamous P0421 - Warm Up Catalyst Efficiency Below Threshold. It's apparent that the manufacturers Mode $06 - Component $05 - TID $01 parameter I'm asking about (cut&pasted from my code readers report below) is triggering this upper level P0421 code somehow, because when this parameter "fixes itself" and goes above the 2048 minimum value when it's really hot out or really cold, the P0421 code goes away and there are no other errors. After a drive cycle the CEL clears, and the reader reports "This vehicle is ready for emissions testing" Mode $06 - On-Board Monitoring Component Description Value Minimum Maximum Units Result Component Id $05 TID $01 - Manufacturer Defined 1344 2048 N/A Fail Component Id $06 TID $01 - Manufacturer Defined 6545 2048 N/A Pass Finally, I forgot to mention earlier I did replace the gas cap, and we did replace the back-end O2 sensors. ------------ For reference, here is the full reader report -- a snapshot taken during a daily drive: Diagnostic Report Created by OBDLink - OBD Solutions​ www.obdsoftware.net ​ Date: 3/7/2024 1:36:13 PM VIN:< redacted > Manufacturer: Porsche Model: Boxster Option: S Year: 2006 Monitor Status Report ECU 11 Name Continuous Status Misfire Yes ECU has completed this test Fuel System Yes ECU has completed this test Comprehensive Component Yes ECU has completed this test Catalyst No ECU has completed this test Heated Catalyst No ECU does not support this test Evap System No ECU has completed this test Secondary Air System No ECU has completed this test Gasoline Particulate Filter No ECU does not support this test Oxygen Sensor No ECU has completed this test Oxygen Sensor Heater No ECU has completed this test EGR and/or VVT System No ECU does not support this test MIL Off Number of Confirmed Codes: 1 Readiness Standard: CA - 2000 and newer (Gas) This vehicle is not ready for emissions testing. Reason ECU 11 Confirmed trouble codes have been detected Trouble Code Report ECU Code Type Status UDS Status Description ECU 11 P0421 PowerTrain Confirmed N/A Warm Up Catalyst Efficiency Below Threshold ECU 11 P0421 PowerTrain Pending N/A Warm Up Catalyst Efficiency Below Threshold Additional Information Description Value Units Malfunction indicator lamp (MIL) status Off Freeze frame DTC P0421 Distance traveled while MIL is activated 251.03 miles Mode $01 - Powertrain Diagnostic Data PID Description Value Units SAE 0x03 Fuel system 1 status 2 SAE 0x03 Fuel system 2 status 2 SAE 0x04 Calculated load value 30.2 % SAE 0x05 Engine coolant temperature 194 °F SAE 0x06 Short term fuel % trim - Bank 1 -2.34 % SAE 0x07 Long term fuel % trim - Bank 1 3.12 % SAE 0x08 Short term fuel % trim - Bank 2 -0.78 % SAE 0x09 Long term fuel % trim - Bank 2 4.69 % SAE 0x0C Engine RPM 674.25 RPM SAE 0x0D Vehicle speed 0 MPH SAE 0x0E Ignition timing advance for #1 cylinder 3 deg SAE 0x0F Intake air temperature 91.4 °F SAE 0x10 Mass air flow rate 0.48 lb/min SAE 0x11 Absolute throttle position 13.73 % SAE 0x12 Commanded secondary air status 4 SAE 0x13 Location of oxygen sensors 51 SAE 0x15 O2 voltage (Bank 1, Sensor 2) 0.635 V SAE 0x15 Short term fuel trim (Bank 1, Sensor 2) 99.219 % SAE 0x19 O2 voltage (Bank 2, Sensor 2) 0.605 V SAE 0x19 Short term fuel trim (Bank 2, Sensor 2) 99.219 % SAE 0x1C OBD requirements to which vehicle or engine is certified 1 SAE 0x21 Distance traveled while MIL is activated 251.03 miles SAE 0x34 O2 sensor lambda wide range (current probe) (Bank 1, Sensor 1) 1.001 SAE 0x34 O2 sensor current wide range (Bank 1, Sensor 1) -0.004 mA SAE 0x38 O2 sensor lambda wide range (current probe) (Bank 2, Sensor 1) 1.003 SAE 0x38 O2 sensor current wide range (Bank 2, Sensor 1) 0 mA SAE 0x56 Long term secondary oxygen sensor trim bank 1 -0.78 % SAE 0x58 Long term secondary oxygen sensor trim bank 2 -0.78 % Aux 0x00 Input voltage read by the scan tool 14.1 V Mode $02 - Freeze Frame First Occurrence Description Value Units Freeze frame DTC P0421 Fuel system 1 status 2 Fuel system 2 status 2 Calculated load value 39.61 % Engine coolant temperature 188.6 °F Short term fuel % trim - Bank 1 -5.47 % Long term fuel % trim - Bank 1 3.12 % Short term fuel % trim - Bank 2 -3.12 % Long term fuel % trim - Bank 2 4.69 % Engine RPM 685 RPM Vehicle speed 0 MPH Ignition timing advance for #1 cylinder 5 deg Intake air temperature 82.4 °F Mass air flow rate 0.69 lb/min Absolute throttle position 14.51 % Commanded secondary air status 4 Long term secondary oxygen sensor trim bank 1 -0.78 % Long term secondary oxygen sensor trim bank 2 0 % Mode $05 - Oxygen Sensors Sensor Available Bank 1 - Sensor 1 Yes Bank 1 - Sensor 2 Yes Bank 1 - Sensor 3 No Bank 1 - Sensor 4 No Bank 2 - Sensor 1 Yes Bank 2 - Sensor 2 Yes Bank 2 - Sensor 3 No Bank 2 - Sensor 4 No Sensor Description Value Minimum Maximum Units Result Bank 1 - Sensor 1 TID $81 - Manufacturer Defined 16 0 255 Pass Bank 1 - Sensor 1 TID $82 - Manufacturer Defined 16 0 255 Pass Bank 1 - Sensor 1 TID $83 - Manufacturer Defined 16 4 255 Pass Bank 1 - Sensor 2 TID $01 - Rich to lean sensor threshold voltage (constant) 0.605 0 1.275 V Pass Bank 1 - Sensor 2 TID $02 - Lean to rich sensor threshold voltage (constant) 0.605 0 1.275 V Pass Bank 1 - Sensor 2 TID $07 - Minimum sensor voltage for test cycle (calculated) 0 0 0.45 V Pass Bank 1 - Sensor 2 TID $08 - Maximum sensor voltage for test cycle (calculated) 0.925 0.45 1.08 V Pass Bank 2 - Sensor 1 TID $81 - Manufacturer Defined 15 0 255 Pass Bank 2 - Sensor 1 TID $82 - Manufacturer Defined 16 0 255 Pass Bank 2 - Sensor 1 TID $83 - Manufacturer Defined 18 4 255 Pass Bank 2 - Sensor 2 TID $01 - Rich to lean sensor threshold voltage (constant) 0.605 0 1.275 V Pass Bank 2 - Sensor 2 TID $02 - Lean to rich sensor threshold voltage (constant) 0.605 0 1.275 V Pass Bank 2 - Sensor 2 TID $07 - Minimum sensor voltage for test cycle (calculated) 0 0 0.45 V Pass Bank 2 - Sensor 2 TID $08 - Maximum sensor voltage for test cycle (calculated) 0.915 0.45 1.08 V Pass Mode $06 - On-Board Monitoring Component Description Value Minimum Maximum Units Result Component Id $05 TID $01 - Manufacturer Defined 1344 2048 N/A Fail Component Id $06 TID $01 - Manufacturer Defined 6545 2048 N/A Pass Component Id $15 TID $02 - Manufacturer Defined 4263 1229 N/A Pass Component Id $16 TID $02 - Manufacturer Defined 4832 1229 N/A Pass Component Id $3C TID $02 - Manufacturer Defined 327 N/A 329 Pass Component Id $27 TID $02 - Manufacturer Defined 331 329 N/A Pass Component Id $2F TID $02 - Manufacturer Defined 39 N/A 58 Pass Component Id $3D TID $02 - Manufacturer Defined 327 N/A 329 Pass Component Id $28 TID $02 - Manufacturer Defined 331 329 N/A Pass Component Id $30 TID $02 - Manufacturer Defined 39 N/A 58 Pass Component Id $01 TID $03 - Manufacturer Defined 34304 4864 N/A Pass Component Id $04 TID $03 - Manufacturer Defined 32000 4864 N/A Pass Component Id $21 TID $05 - Manufacturer Defined 83 82 N/A Pass Component Id $29 TID $05 - Manufacturer Defined 3109 3107 N/A Pass Component Id $2A TID $05 - Manufacturer Defined 3727 3726 N/A Pass Component Id $2D TID $05 - Manufacturer Defined 1 N/A 2 Pass Component Id $0D TID $06 - Manufacturer Defined 43648 40881 N/A Pass Component Id $0E TID $06 - Manufacturer Defined 43654 40881 N/A Pass Component Id $11 TID $06 - Manufacturer Defined 47 N/A 3009 Pass Component Id $12 TID $06 - Manufacturer Defined 83 N/A 3009 Pass Component Id $0A TID $09 - Manufacturer Defined 0 N/A 11 Pass Mode $09 - Vehicle Information General Information Description Value Vehicle Identification Number <redacted> Calibration ID - ECU 11 9876186240300000 Calibration Verification Number - ECU 11 EA1EB10C In-Performance Tracking ECU Counter Description Value ECU 11 0x00 OBD Monitoring Conditions Encountered Counts 5391 ECU 11 0x01 Ignition Cycle Counter 15607 ECU 11 0x02 Catalyst Monitor Completion Counts Bank 1 4993 ECU 11 0x03 Catalyst Monitor Conditions Encountered Counts Bank 1 5363 ECU 11 0x04 Catalyst Monitor Completion Counts Bank 2 4512 ECU 11 0x05 Catalyst Monitor Conditions Encountered Counts Bank 2 5363 ECU 11 0x06 O2 Sensor Monitor Completion Counts Bank 1 5130 ECU 11 0x07 O2 Sensor Monitor Conditions Encountered Counts Bank 1 5391 ECU 11 0x08 O2 Sensor Monitor Completion Counts Bank 2 5191 ECU 11 0x09 O2 Sensor Monitor Conditions Encountered Counts Bank 2 5391 ECU 11 0x0A EGR and/or VVT Monitor Completion Condition Counts 12403 ECU 11 0x0B EGR and/or VVT Monitor Conditions Encountered Counts 5391 ECU 11 0x0C AIR Monitor Completion Condition Counts (Secondary Air) 3040 ECU 11 0x0D AIR Monitor Conditions Encountered Counts (Secondary Air) 3512 ECU 11 0x0E EVAP Monitor Completion Condition Counts 923 ECU 11 0x0F EVAP Monitor Conditions Encountered Counts 2408