The P2421 automobile fault code refers to a faulty Evaporative Emission Vent Shut Valve, which can cause the engine light to turn on.

This may indicate a poor electrical connection, an open or shorted harness, or a damaged component. It is important to visually inspect the wiring harness and connectors for any signs of damage or corrosion. The repair time for this issue is estimated to be around 1.0, and it is crucial to address this problem promptly to avoid further damage to the vehicle.

To interpret the fault code, it is recommended to check the “Possible Causes” listed above and follow the suggested fix accordingly.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

If you notice the Engine Light ON or Service Engine Soon Warning Light, it could be a sign of p2421 fault code. Here are the symptoms to look out for:

  • The P2421 fault code in an automobile can cause several symptoms, including the engine light turning on or the service engine soon warning light appearing.
  • Other symptoms may include a decrease in engine performance, reduced fuel efficiency, and difficulty starting the engine.
  • Additionally, the vehicle may experience rough idling or stalling, and there may be a noticeable decrease in power when accelerating.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle.

The automobile fault code p2421 can be caused by a faulty valve, open or shorted harness, or poor electrical connection.

  • The automobile fault code P2421 can be caused by a faulty Evaporative Emission Vent Shut Valve.
  • It can also be caused by an open or shorted Evaporative Emission Vent Shut Valve harness.
  • Additionally, a poor electrical connection in the Evaporative Emission Vent Shut Valve circuit can also trigger this fault code.

To fix the p2421 fault code, check the possible causes and inspect the wiring harness and connectors for any damage or corrosion.

  • To fix the automobile fault code p2421, you need to check the possible causes listed above.
  • Visually inspect the related wiring harness and connectors.
  • Look for damaged components and check for broken, bent, pushed out, or corroded connector’s pins.
  • This fix will take an estimated repair time of 1.0 hour.

The fault code P2421 indicates a problem with the evaporative emission system vent valve stuck closed. The estimated repair time for this issue is 1.0 hour.

The cost of fixing this issue can vary depending on the auto repair shop, but it is common for them to charge between $75 and $150 per hour. Other factors that may influence the cost include the location of the repair shop, the severity of the issue, and the type of vehicle.

The P2421 code indicates a problem with the Evaporative Emission System Vent Valve. The Fuel Tank Pressure (FTP) sensor output indicates a vacuum during purging. This could be due to an FTP sensor zero point shift failure or an EVAP canister vent shut valve stuck closed failure.

The Powertrain Control Module (PCM) monitors the FTP sensor output after purge starts to detect excessive vacuum. If the fuel tank internal pressure is below the specified value, it is difficult to distinguish between P1454 and P2422. In this case, both DTCs are stored if neither is stored, both are stored if both temporary DTCs are stored and excessive vacuum is detected, and the PCM stores the DTC of the temporary DTC that was stored if either is stored and excessive vacuum is detected.

What are the possible causes of the P2421 automobile fault code?

If you’re experiencing the P2421 fault code, your engine light or service engine soon warning light may be on. This code is typically caused by a faulty Evaporative Emission Vent Shut Valve, an open or shorted harness, or a poor electrical connection in the valve circuit. To fix the issue, it’s recommended to visually inspect the wiring harness and connectors for any damage or corrosion, and check for broken or bent pins.

How can I visually inspect the related wiring harness and connectors to fix the P2421 fault code?

If you’re experiencing the P2421 fault code, with the engine light on or service engine soon warning light, it could be due to a faulty Evaporative Emission Vent Shut Valve, an open or shorted harness, or poor electrical connection. To fix this issue, start by visually inspecting the related wiring harness and connectors. Check for any damaged components and look for broken, bent, pushed out, or corroded connector’s pins. Don’t forget to check the possible causes listed above.

What are the signs that the Evaporative Emission Vent Shut Valve circuit has a poor electrical connection causing the P2421 fault code?

If the Evaporative Emission Vent Shut Valve circuit has a poor electrical connection, it can cause the P2421 fault code, which triggers the Engine Light or Service Engine Soon Warning Light. To fix this issue, you need to visually inspect the related wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector’s pins.

p2421 error fault code explained

If your engine light is on, it could be due to a faulty Evaporative Emission Vent Shut Valve, an open or shorted harness, or poor electrical connection.

Visually inspect the wiring harness and connectors for damage and check for broken, bent, pushed out, or corroded connector pins.

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