Fiat Trouble Codes and Known Issues

Fiat (Stellantis) is especially popular in South America with the Uno, Palio, Siena, Strada, Mobi, Argo and Cronos, and in North America with the 500. Its Fire and E.torQ engines are simple and cheap to repair; the Dualogic automated gearbox and the body electronics account for a large share of the questions.

Most searched models: 500, Uno, Mobi, Palio, Siena, Strada, Argo, Cronos, Pulse, Toro and Ducato.

Common problems on Fiat vehicles

• Camshaft and crankshaft sensors on Fire engines.
• MAP sensor and electronic throttle body.
• Dualogic automated gearbox: hydraulic pump and actuators.
• Corroded connectors under the battery, which set U codes.

Tips for diagnosing a Fiat

• After cleaning the throttle body or replacing the battery, some Fiats need a relearn with a scan tool.
• On the Dualogic, check the hydraulic fluid level and the pump before replacing the module.

Do you have several codes at once? Use the free multi-code diagnosis for Fiat: it sorts the codes by priority and shows these make-specific notes. Below are the codes with documented quirks on Fiat vehicles.

Make notes are a guide based on well-known common failures. Always confirm with the manufacturer's documentation for your engine and model year.