[TalonTsi90]

Excuse this question but "Air flow sensor" would be the EGR valve

Uh, no. Neither has anything to do with each other. Im still trying to figure out the "link" between the braking system and the intake/exhaust system, it just doesnt compute to me. The ONLY thing i can think of, is the vacuum pump on the cam that supplies the brake booster, instead of a plenum vac port like they used to do.

 

[TalonTsi90]

brake booster pump

THIS would cause an SCBS error AFAIK.

 

[TalonTsi90]

even the errors on the EGR valve block the SCBS ... let alone an error on the brake booster pump. I think that any error or anomaly detected by the sensors alarms the whole system and blocks SCBS
it's my deduction anyway ... I'm not a mechanic

I guess its possible that since the EGR recircs to the intake and the pump is on the intake cam... maybe its "tied together" but it makes zero sense otherwise.

 

[TalonTsi90]

I have just had the same problem. Dealer thinks it has something do do with a sensor - around $2000 just for the part.

If its really the MAF, thats under $40.

 

[TalonTsi90]

I was quoted £300 for Mazda mass airflow sensor, but can see Chinese versions on ebay for £20 - £40 so will try one of these first if cleaning does not work. I'll report back on results.

2018 Mazda CX-9 Mass Air Flow Meter Sensor MAF OEM 57K Miles (LKQ~252627836) | eBay

 

[TalonTsi90]

MAS (Mass airflow sensor) and MAF (Mass air flow) are the same thing, MAP (Manifold absolute pressure) is not and is only mostly used on turbo cars.

 

[TalonTsi90]

What happened.my car is doing the same thing

Well, since youre in the US, you dont have a diesel, so not the same issue.

 

[TalonTsi90]

I spoke with Mazda today and they said it needed recalibration and specialist fitting

Cancel your appt, get Forscan and an adapter and reset the FBCM.

 

[TalonTsi90]

I only have iPad so will try obdlink mx + bt adaptor.

Wont work, gotta be a supported adapter.

Question….. I purchased a used SCBS forward camera from eBay and the local Mazda dealer said it cannot be installed into another car due to it having been programmed for its original car and is protected by a pin code # ?

It has to be programmed, but first ive heard of a pin. But im telling you, this isnt the issue.

 

[TalonTsi90]

Hi Talon

I got FORScan and the correct adaptor. This is what I was seeing:
Successful DTC reading, no error codes found

Module: Transmission Control Module
===END TCM DTC===

===PCM DTC U023A:00-2E===
Code: U023A - Lost Communication with Forward Sensing Camera.

cannot find this code recorded anywhere and I cannot see with the software where to clear codes. Can you help at all please.

You didnt follow the last 3 words i said.

 

[TalonTsi90]

Reluctant to change this due to the cost and it not working for others.

They are cheap, but not the problem, its the MAP sensor, gotta clean it.