U3408 Fiat Punto Evo Diagnostic Trouble Code

U3408 Fiat Punto Evo code definition:
U3408 is a kind of OBD-II Diagnostic U-Network Diagnostic Trouble Code for Fiat Punto Evo.

U3408 Fiat Punto Evo is defined as Camshaft Position Sensor A Circuit Low. This means the CMP (camshaft position) sensor circuit on engine bank 1 sends an irregular reading. As you drive and when specific conditions are slowly met, the vapors will gradually purge from the charcoal canister and will get burned within your engine.

Symptoms

Symptoms of a U3408 Fiat Punto Evo diagnostic trouble code may include:
  • Carbon Buildup on O2 Sensor
  • Malfunction Indicator Lamp (MIL) illuminated
  • Hesitation upon acceleration
  • If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Place of U3408 in engine

Possible Causes :

  • Fuel with a large percentage of sulfur will clog the DPF quickly
  • The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
  • Some aftermarket accessories and performance modifications

Common Misdiagnoses

  1. Control Module Throttle Actuator Position Performance Problem
  2. Air Conditioning (A/C) Clutch Feedback Circuit High Voltage Problem
  3. Cruise Vehicle Speed/Set Speed Difference Too High Problem
  4. Kick-Down Switch Failed Short Problem
  5. Park/Neutral Postion (PNP) Switch Circuit Engine Torque Signal Circuit 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. Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed.

Process Tips

Diagnostic trouble code U3408 Fiat Punto Evo 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 U3408 Fiat Punto Evo.

Fortunately, U3408 Fiat Punto Evo is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

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