Not assigned in the generic OBD-II standard - if your scan tool shows this code, it is manufacturer-specific; verify the meaning in your make's service information
The P2356 code means the vehicle's onboard diagnostic system has detected: Not assigned in the generic OBD-II standard - if your scan tool shows this code, it is manufacturer-specific; verify the meaning in your make's service information. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- hard
- Estimated cost
- Unknown until the make-specific meaning is confirmed
What Are the Symptoms of P2356?
- Depends entirely on the manufacturer-specific meaning - no generic definition exists
What Causes P2356? (Most Likely First)
- This code ID is not defined by SAE J2012; a stored instance is manufacturer-assigned High
Can I Still Drive with P2356?
Yes, but fix soon. P2356 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring the light.
Frequently Asked Questions
Why can't I find a standard definition for P2356?
Because the generic OBD-II standard does not assign this ID. Any stored P2356 is a manufacturer-specific code; its meaning must come from your make's service documentation.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2356?
-
Confirm the code with a make-specific (enhanced) scan tool.
-
Look the code up in your manufacturer's official service information.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Which Vehicles Commonly Get P2356?
- 2009-2017 BMW 328i 2.0L Turbo I4
- 2015-2023 Hyundai Sonata 2.4L I4
- 2011-2019 Chevrolet Silverado 1500 5.3L V8
- 2012-2020 Honda Accord 1.5L Turbo I4
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