# P1326 cel engine code. vehicle in limp mode. gas 2.4 GDI

**URL:** <https://community.cartalk.com/t/p1326-cel-engine-code-vehicle-in-limp-mode-gas-2-4-gdi/140271>\
**Category:** Maintenance/Repairs\
**Tags:** hyundai, sonata\
**Created:** [May 13, 2019, 7:22pm UTC](https://community.cartalk.com/t/p1326-cel-engine-code-vehicle-in-limp-mode-gas-2-4-gdi/140271 "2019-05-13T19:22:39Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jdtzillagod\_151942](https://avatars.discourse-cdn.com/v4/letter/j/97f17d/32.png) [@jdtzillagod\_151942](https://community.cartalk.com/u/jdtzillagod_151942)\
**Post date:** [May 13, 2019, 7:22pm UTC](https://community.cartalk.com/t/p1326-cel-engine-code-vehicle-in-limp-mode-gas-2-4-gdi/140271/1 "2019-05-13T19:22:40Z")

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anyone experience this code and concern? it’s a hard fault and my snap on scanner says it’s a glow plug relay stuck on. this is a gasoline engine and does not have glow plugs. any help?

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**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\
**Post date:** [May 13, 2019, 7:36pm UTC](https://community.cartalk.com/t/p1326-cel-engine-code-vehicle-in-limp-mode-gas-2-4-gdi/140271/2 "2019-05-13T19:36:41Z")

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Your Snap-On scanner may not be up to date. Fault P1326 was added the the PCM via a software update to detect engine bearing failure using the knock sensor.

The system is flawed, electrical interference in the wiring can cause false alarms. An overlay wiring harness has been developed to correct the false alarms.

Here is a tread with a dozen other people with the same problem;

> [@2018 Hyundai Sonata - Wiring issue](https://community.cartalk.com/t/2018-hyundai-sonata-wiring-issue/134559):
>
> I purchased my 2018 Sonata 5/2018. I took it in for it’s 1st check up & oil change 1/22/19 @ only 4k miles. They also did an ‘update’. As I drove home, the car was losing power. Took it back to the dealer who finally determined it needed a new major harness. Still waiting for my car 2/12/19. How bad is this? Potential future problems? Other thoughts? Thanks!

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**Author:** ![Manolito](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/manolito/32/3070_2.png) [@Manolito](https://community.cartalk.com/u/Manolito)\
**Post date:** [May 13, 2019, 8:20pm UTC](https://community.cartalk.com/t/p1326-cel-engine-code-vehicle-in-limp-mode-gas-2-4-gdi/140271/3 "2019-05-13T20:20:03Z")

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Since this is a new car and they are willing to give you a better wiring harness segment on warranty, I would take it and be happy, and I would not be concerned about future problems.

I know nothing of this specific car, but in general, if a car is getting phantom errors due to electrical interference, the first thing to check is aftermarket accessories that can generate RF interference. Back in the 1990s, analog cell phones could cause problems. These days, a common culprit is poor quality USB chargers that plug in to the car’s 12V power ports.