B0409 Fiat 130 Diagnostic Trouble Code - Diagnostic Trouble Codes

B0409 Fiat 130 Diagnostic Trouble Code B0409 Fiat 130 code definition: B0409 is a kind of OBD-II Diagnostic B-Body Diagnostic Trouble Code for Fiat 130.

B0409 Fiat 130 shows up when there's an electrical problem that causes the fuel volume regulator to malfunction and open. It's quite an unusual problem and likely intermittent. Other symptoms that may indicate this problem are when the Check Engine Light illuminates and when there is a visible lack of engine power.

Symptoms

Symptoms of a B0409 Fiat 130 diagnostic trouble code may include:

• Misfire
• Misfire
• The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
• Rich or lean exhaust

Possible Causes : The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction. Fuel with a large percentage of sulfur will clog the DPF quickly An air leak forward of the DPF will change the sensor readings resulting in the code

Common Misdiagnoses

1. Crankshaft Position Sensor Circuit Performance Problem
2. TP Sensor Learn Not Complete Problem
3. Low Coolant Circuit Problem
4. Cruise Control System - Vehicle Accel Too High Problem
5. Kick-Down Switch Failed Short Problem

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications.

Process Tips

Diagnostic trouble code B0409 Fiat 130 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before B0409 Fiat 130.

Fortunately, B0409 Fiat 130 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.