Nissan Juke - P0101 Help Requested

Check and clean the throttle body. and do a airflow relearn, also check for pcm updates. i know they released a few updates for this code.

Also seen a lot of aftermarket MAF sensors cause these codes … (we have a rule OEM ONLY)

Dont know what kind of replacement sensor was installed, but I have seen a bunch of issues with Nissan and aftermarket sensors.

Thank you , I changed the original part number from the dealer compatible with vin number . Maybe it need update ?

Check TSBs We do tons of reprogramming for this code on nissan.

Dealer sensor and update PCM to start. THEN if it comes back diagnose it but that should fix it

I'm with Allan!

The TSB reflash almost always fixes this. Verify that the LTFT is not out of range after the reflash.

New logo Jeff?

Check for tsb there is update for p0101

I agree the reflash is most likely the answer. But I would be sure and double check the air intake boot. Between the MAF and the throttle body.

thank you for all ,the intake boot between MAF and throttle body is good ,i will try to reflash ecu monday.

This vehicle does not fall under the TSB parameters for the reflash. I would suggest a factory (not an AM ‘compatible’ sensor) from the dealer, and a throttlebody cleaning and IAVL.

Check your Freeze frame. If the long and short trim (or Alpha) are in the normal ballpark, update the ECM software. Always works in my experience.

Check for air leaks after the MAF, replace MAF with OE-Nissan AF meter only, also may want to clean TB, although you run the risk of causing problems with that TB but it's never happened to me, check for ECM updates, reset self-learn A/F ratio so that the AF adjust is 0.000, idle air relearn, closed throttle learn. This is what I do, never had a comeback.

FIRST… you will need to perform the Intake Air Volume Learn using a scan tool. It likely just needs the reset performed. Try this first. Most professional-grade scan tools can do this. Not sure if this was already mentioned, But I would recommend performing a Volumetric Efficiency test with the new MAF sensor installed. It's likely that it's just a bad part, assuming the engine doesn't have any…

Hello Nathan, Hope you don't mind my commenting. While a popular “go to” test, VE testing has a number of flaws. When it works the input is typically so skewed that almost any MAF test would work just as well. Anything from 70% to over 100% is normal depending on the engine. If you expect the wrong number, then you could easily have a good engine with bad numbers and vice versa. Additionally…

There was a trade pub. article a few years back where the guy compared Load %, with Load_ABS, with o.g. VE testing. Think he concluded they were all quite similar....it was just a big waste of ink, really....LOL

Morning Geoff Be careful though of the (generic) calculated load PID, it is linearly correlated with engine vacuum. The OE load definitions vary, but many are essentially calculated load.