P0956: ASM Mode Circuit Range/Performance

What does P0956 mean?

P0956 is a diagnostic trouble code indicating "ASM Mode Circuit Range/Performance". The sensor or component is providing readings, but they fall outside the expected operating range. The part may be degraded, contaminated, or experiencing intermittent issues affecting engine electronics performance.

Common causes

• Worn or contaminated engine electronics component
• Vacuum leak or intake air leak
• Clogged filter or restricted flow
• Intermittent electrical connection issue

What should you do?

Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.

Get a diagnosis for YOUR car

Code P0956 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.

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