You have a Fiat 500X 1.0 MultiAir 3 cylinders and these three error codes appeared in the diagnostics:
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P1471 : Catalytic converter protection function malfunction
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P1067 : Cylinder 2 – Intake valve lift control solenoid (component not activated)
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P0302 : Cylinder 2 misfire
In this article we explain the meaning of each code, the possible problems related to the MultiAir module , and useful tips for diagnosis .
1. Code P1471 – Catalytic Converter Protection
This error indicates that the catalytic converter may not be protected properly. This often happens due to incomplete combustion, such as a misfire. So it is a secondary error , caused by upstream problems, such as the one highlighted in cylinder 2.
2. Code P1067 – Cylinder 2 MultiAir Solenoid Valve Inactive
Here we get to the heart of the matter: the MultiAir system uses an electro-hydraulic module to manage valve lift. P1067 indicates that the solenoid valve controlling the intake valve of cylinder 2 is not active . This could be caused by:
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Solenoid valve malfunction
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MultiAir module problems
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Power failure or faulty wiring
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Faulty control unit (but less likely)
3. Code P0302 – Cylinder 2 Misfire
This error confirms a combustion problem in cylinder 2 , which may be related to:
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Faulty spark plug (already excluded in your case)
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Faulty coil
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Injector malfunction
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Intake valve problem (as indicated by P1067)
How to proceed with the diagnosis:
Here are some practical steps recommended by industry professionals :
✅ Check the ignition coils: Even if the spark plug is ok, the coil could be bad. Try swapping it between cylinders and see if the error moves.
✅ Check the wiring and connectors of the MultiAir module: often there is an oxidized contact or a broken wire.
✅ Check the MultiAir module: if all other components are working, the module may be the problem . In some cases, an internal cleaning with new oil and hydraulic additives is sufficient. In other cases, the module may need to be replaced or overhauled .
✅ Update the engine control unit (ECU): sometimes a software update can solve problems related to the management of the MultiAir.
Final advice
🔧 If you do not have advanced diagnostic tools, we recommend that you rely on a workshop specialized in MultiAir engines . The module is very sensitive and an incorrect diagnosis can lead to unnecessary and expensive replacements.
💡 If you need to replace the MultiAir module, check the possibility of overhauling it instead of replacing it with a new one : the savings can be significant and the performance identical.
Frequently Asked Questions (FAQ)
🔧 Where can I find the MultiAir module for my 500X?
You can contact Autoricambi Tritella, specialized in components for Fiat engines and MultiAir systems.
⚙️ Can I use additives to clean the MultiAir module?
Yes, there are specific additives to improve the functioning of the MultiAir hydraulic system , but they must be used wisely and only if the module is not seriously damaged.
📍 Is it normal that it only gives an error on one cylinder?
Yes, especially if only one solenoid valve or coil has problems. It is the localized error that helps you in the diagnosis.
Conclusion
If you have encountered errors P1471, P1067 and P0302 on your Fiat 500X 1.0 MultiAir , the most likely cause is a malfunction of the MultiAir module in cylinder 2. First check the spark plugs, coils and wiring. If everything is OK, contact an expert center to have the module checked or overhauled .
