P0466 OBD Error Code: Problem & Solutions

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The OBD trouble code P0466 can be defined as Purge Flow Sensor Circuit Range/Performance. If the powertrain control module would detect some issue in the EVAP system, then it would start triggering the P0466 error code.

The P0466 fault code would start indicating that a portion of the EVAP control system is not working effectively. There are a number of components of the EVAP system like the gas cap, fuel lines, charcoal canister, purge valve, system pressure, electrical wiring as well as connectors.

What causes this problem with the Purge Flow Sensor Circuit Range/Performance?

• Quirky pressure or flow sensor
• Failure in the purge control solenoid
• Issue of clogged or broken charcoal canister
• There can be loose or defective fuel cap
• The vacuum/fuel vapour hoses might be broken, cracked or deteriorated

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2. Fuel Pump - If everything is alright with PCM, then there is surely some defect in Fuel Pump. Get Carter Fuel Pump replaced before the situation gets worse.
3. Injector Pump - P0466 code can display due to some issues in the Injector Pump. So, it is very important to replace the Injector Pump online with us at equitable prices.
4. Powertrain Control Module - Do you remember when was the last time you got your car Powertrain Control Module checked up? A faulty Powertrain Control Module can cause a lot of issues like displaying P0466 code.
5. Electronic Control Unit - Are there some faults in your Electronic Control Unit? Don’t waste time and get car ECU replaced or else P0466 code can turn up.
6. Engine Control Module - Everything is fine with Injector Pump and still P0466 code triggering? Then you must get your engine control module checked.
7. Fuel Injector - There can be some issues with the PCM due to which you may see P0466 code appearing over and over again. Visit us to buy best quality Bosch Fuel Injectors online.

There could be countless symptoms which that would accompany with this fault code. Willing to know some common symptoms of OBD Trouble Code P0466? Your wish is our demand. Have a look at them below:

Common Symptoms

• Malfunction indicator lamp can start illuminating
• There overall fuel economy might start decreasing

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• The defective vacuum lines or vapour lines should be replaced
• Carefully tighten the fuel cap
• It is very important to restore the charcoal canister purge valve or solenoid
• You can always replace the fuel cap
• Make sure to replace the charcoal canister

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It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P0466 code to be stored:

The main function of the EVAP system is to capture the fuel vapours from the fuel tank and lines and prevent them from escaping into the atmosphere. This is accomplished by engine vacuum, a charcoal storage reservoir canister and electric solenoids.

Plastic or metal hoses supply flammable fuel vapours to the canister, where they are stored until a signal from the PCM activates the purge control solenoid and opens the purge control valve.

Now when the engine is running, the purge control valve would allow the engine vacuum to bring the fuel vapours into the engine’s intake, where they can be burned.

The canister is generally situated under the vehicle by the fuel tank. Lines from the charcoal canister to the engine are quite long and are prone to damage from road debris and the elements.

A scanner/code reader, digital volt/ohmmeter and smoke machine will be useful in a diagnosis of code P0466.

• First of all, you must visually inspect all wiring and connectors and repair/replace any damaged, disconnected, corroded, shorted wiring, connectors or components as needed
• If all wiring, connectors and components appear to be in good shape, then you must connect the code reader to the diagnostic connector
• All the stored codes should be recorded, freeze frame data and then clear the codes
• The vehicle should then be taken out for a test drive to see if codes return
• If the codes return, start your diagnostic process by removing and replacing the fuel cap, clear the code again, then test drive the vehicle to see if the code returns
• If the code returns once again, then you should visually inspect the vacuum lines and fuel vapour hoses for cracks, splits, kinks, breakage, loose fittings or deterioration. Repair/replace as per the requirement
• You must inspect the charcoal canister and purge valve for damage or corrosion, replace any defective parts as needed
• Place the vehicle on a lift and start the engine. From underneath, listen closely to the purge control solenoid. Listen for vacuum leaks near the purge control valve, or the hose that runs from the purge valve to the intake
• When the solenoid begins making a clicking noise, the purge valve should be opening and closing. Place the smoke machine nozzle into the vacuum supply hose for the purge solenoid, allowing it to fill the system with smoke. Watch closely for escaping smoke from lines, hoses or system components. Pay particular attention to smoke from the gas cap, as faulty fuel caps are very common
• The charcoal canister is vented, so smoke will escape slowly from the unit. This is normal
• Liquid can infiltrate the charcoal canister, clogging it and impeding purge flow. With the purge solenoid open, check for suction at both sides of the canister. If there is suction to the canister, it is likely to have failed
• Remove the canister and shake it, listening for any rattles from broken or loose particles. Replace as per the requirement. If the canister looks normal, check fuel vapour hoses for kinks or crushed areas
• If the canister/lines appear normal, then the purge control solenoid should be tested. It should act as an on/off valve, completing a circuit powered by the battery at normal battery voltage
• If the solenoid is faulty, an EVAP control circuit code should accompany P0466. If this is the case, inspect connectors and wiring for signs of corrosion or damage. Repair as needed
• If wiring and connectors appear to be good, unplug the connector from the PCM and perform a resistance check on the purge control solenoid, system pressure/flow sensors and system wiring
• Compare your findings to manufacturer’s specs. Repair as needed. Reset the codes and test drive the vehicle, keeping in mind that multiple drive cycles may be needed for the code to return

Common Mistakes When Diagnosing The P0466 Code

Most of the time EVAP components are replaced when the problem was nothing more than a vacuum leak or loose fuel cap. So, it is very important to take care of this issue.