Lost key, coding new key Engine cranks but won’t start

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Jun 22, 2025 | 08:43 PM

Mattryca

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Joined: Jun 2025

Posts: 1

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Lost key, coding new key Engine cranks but won’t start

Hi everyone,
I have a problem with my 2016 Mazda CX-5 2.2 Diesel 150 HP, FWD.

Two weeks ago, I lost my only car key. I called a specialist who tried to program a new key, but had a lot of trouble with it. In the end, he managed to program a universal key, but couldn’t get an original Mazda key to work. He said everything seemed fine on his end, and left me with the universal key so I could at least check the engine.

The engine cranks but doesn’t start.

I hooked it up to FORScan and got the following fault codes:

P1260: -2F
B13D3:4A-8A
B13D3:97-8A
B13D3:94-0A

Before losing the key, the car started and drove perfectly fine.
Has anyone experienced something like this? Any suggestions on where to start?

Thanks in advance for any help!

Jun 23, 2025 | 03:00 AM

hsdejong

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Joined: Jun 2023

Posts: 205

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Contact a Mazda dealer for help.

Jun 23, 2025 | 06:39 AM

Geluk

Senior Member

Joined: Jul 2020

Posts: 136

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From: Thames Valley, UK

WHEN programming new key, all keys must be programmed at same time. Besides a dealer,
a good mobile auto electrician could sort.

Jun 24, 2025 | 09:11 PM

grim_reaper

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Joined: May 2012

Posts: 7,848

Likes: 32

From: Queensland Australia

Quote:

Originally Posted by Mattryca

Two weeks ago, I lost my only car key. I called a specialist who tried to program a new key, but had a lot of trouble with it. In the end, he managed to program a universal key, but couldn’t get an original Mazda key to work. He said everything seemed fine on his end, and left me with the universal key so I could at least check the engine.

Thanks in advance for any help!

The "Specialist" clearly isn't special enough.

I would recommend booking it in with your local Mazda dealership.