Nanocom drive cycle nightmare (motronic)

[discohead]

Hi all, long time browser — more active on a separate LR site.
I’m running into a problem and hoping to get some insight from the folks here, as my usual forum has come up empty.

I’m located in California USA, so require emissions testing.

I can’t get my monitors to set despite completing the drive cycles that my nanocom is telling me to complete.

I’ve got a check engine light on, and my nanocom is showing the code

“Air flow to throttle angle cross check fault drive cycle B - occurred <some number> times - fault is currently present”

Based on RAVE, drive cycle B should be:

1 Switch ignition on for 30 seconds .
2 Ensure engine coolant temperature is less than 60 degrees C (140 degrees F) .
3 Start the engine and allow to idle for 2 minutes .
4 Perform 2 light accelerations (0 to 35 mph (0 to 60 km/h) with light pedal pressure).
5 Perform 2 medium accelerations (0 to 45 mph (0 to 70 km/h) with moderate pedal pressure).
6 Perform 2 hard accelerations (0 to 55 mph (0 to 90 km/h) with heavy pedal pressure).
7 Allow engine to idle for 2 minutes .
8 Connect TestBook and with the engine still running, check for fault codes.

However I’ve completed that drive cycle for what feels like a thousand times. All while keeping the fuel level between 1/4 and 3/4 full. And yet my purge test and o2 monitors (the sensor, not the temperature — that one has completed just fine) aren’t setting.

Are there any nanocom experts who might know what’s going on? Could it be that I should be doing a different drive cycle despite it telling me to complete B?

Thanks in advance.

[shack]

A U.K. site may be able to help more for this particular problem, but anyway...

What sensors have you replaced?

[sierrafery]

Hi, this happened to a friend of mine once with the same code and we struggled a lot to diagnose it but at the end we found that the TPS was at fault, IMO nanocom overcomplicated a bit the fault description including the drive cycle into the ecuation while the problem is that the TPS fails on the system's diagnostic self check(3'rd in the description), plug in a OBD2 reader too and if you get the P0101 code replace the TPS. I attached the relevant part from RAVE

[discohead]

Hi, this happened to a friend of mine once with the same code and we struggled a lot to diagnose it but at the end we found that the TPS was at fault, IMO nanocom overcomplicated a bit the fault description including the drive cycle into the ecuation while the problem is that the TPS fails on the system's diagnostic self check(3'rd in the description), plug in a OBD2 reader too and if you get the P0101 code replace the TPS. I attached the relevant part from RAVE

Thank you! I'll get a cheap reader and see what it comes back with. I had a strong suspicion about the TPS earlier and bought one from amazon. I learned that most aftermarket sensors are junk -- they don't connect well to the wiring harness. Talked with the guy at rovers north here in the states and he told me that you've gotta go with the Bosch despite it being $$$$.

[sierrafery]

Thank you! I'll get a cheap reader and see what it comes back with. I had a strong suspicion about the TPS earlier and bought one from amazon. I learned that most aftermarket sensors are junk -- they don't connect well to the wiring harness. Talked with the guy at rovers north here in the states and he told me that you've gotta go with the Bosch despite it being $$$$.
Better try with a genuine used one which is under warranty as being in good working order, you should find on ebay USA, many of them in UK