Yanmar Immobilizer / Anti-Theft Active
The YANMAR-P1260 (Yanmar) diesel fault code means: Yanmar Immobilizer / Anti-Theft Active. This is a serious severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- intermediate
- Estimated cost
- $50-$400
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Common Symptoms
- Will not crank on compact tractor
- Key indicator lamp flashing
Probable Causes (Ranked by Likelihood)
- Wrong key / key chip not paired Likely
- Immobilizer antenna failure around ignition switch Possible
Step-by-Step Diagnostic Procedure
Re-learn key in SmartAssist.
Check antenna ring continuity.
Frequently Asked Questions
What is Yanmar code P1260?
Yanmar P1260: Yanmar Immobilizer / Anti-Theft Active.
Can I keep operating with Yanmar code P1260?
Do not operate. Risk of engine damage.
How much does Yanmar P1260 cost to fix?
Typical cost: $50-$400. Yanmar SmartAssist / YDT diagnostic software is often required.
P1260 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: