PowertrainP2421
CautionSeverity: Caution - get it checked when you can
EVAP system vent valve stuck open
Key terms: EVAP: the system that traps fuel vapour · Control module: a small computer that runs one part of the car · Powertrain: engine, transmission and emissions
1What it means in plain English
The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.
2Common causes
- Sensor or actuator fault
- Wiring or connector fault
- Vacuum or intake leak
- Fuel or ignition problem
- Control module fault
3Can I drive?
Have it diagnosed promptly. If the car runs and drives normally, drive gently to a workshop. If it runs badly, stalls, overheats, loses oil pressure, or a warning light is flashing or red, stop safely and get professional help. If the code concerns the brakes, brake vacuum or brake assist, do not drive until it is checked: a hard pedal or longer stopping distance means stop.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 29
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P2421 | Maintenance Indicator Lamp. Short Circuit To Ground Brand | Powertrain |
| BAIC Motor | P2421 | Evaporative Emission System Vent Valve Stuck Open Brand | Powertrain |
| Mercedes-Benz | P2421 | No description available | Powertrain |
| BYD | P2421 | Evaporative Emission System Vent Valve Stuck Open Brand | Powertrain |
| Chery | P2421 | CCV valve stuck open Brand | Powertrain |
| Daewoo | P2421 | Evaporative Emission System Vent Valve Stuck Open Brand | Powertrain |
| DFFS | P2421 | Evaporative Emission System Vent Valve Stuck Open Brand | Powertrain |
| DFFX | P2421 | Evaporative Emission System Vent Valve Stuck Open Brand | Powertrain |
| DFXK | P2421 | CCV valve stuck open Brand | Powertrain |
| EOBD | P2421 | EVAP system vent valve stuck open Brand | Powertrain |
| Geely | P2421 | Evaporative Emission System Vent Valve Stuck Open Brand | Powertrain |
| GM | P2421 | Evaporative Emission System Vent Valve Stuck Open Brand | Powertrain |
| Great Wall | P2421 | Evaporative Emission System Vent Valve Stuck Open Brand | Powertrain |
| Hafei | P2421 | Evaporative Emission System Vent Valve Stuck Open Brand | Powertrain |
| Holden | P2421 | Evaporative Emission (EVAP) Vent Solenoid Valve Stuck Open Brand | Powertrain |
| Honda | P2421 | Check fuel tank pressure for Brand | Powertrain |
| Hyundai | P2421 | No description available | Powertrain |
| Land Rover | P2421 | EVAP System Vent Valve Stuck Open Brand | Powertrain |
| Mitsubishi | P2421 | Purge flow Brand | Powertrain |
| Opel | P2421 | Evaporative Emission System Vent Valve Stuck Open Brand | Powertrain |
| Peugeot | P2421 | No description available | Powertrain |
| Proton | P2421 | Purge flow Brand | Powertrain |
| Saab | P2421 | Evaporative Emission System Vent Valve Stuck Open Brand | Powertrain |
| MG (SAIC) | P2421 | Evaporative Emission System Vent Valve Stuck Open Brand | Powertrain |
| Smart | P2421 | No description available | Powertrain |
| Sprinter | P2421 | No description available | Powertrain |
| Subaru | P2421 | No description available | Powertrain |
| Tata | P2421 | Evaporative Emission System Vent Valve Stuck Open Brand | Powertrain |
| Toyota | P2421 | EVAP system vent valve stuck open Brand | Powertrain |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 1
These 7-character codes are manufacturer-specific variants of P2421 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P242100 | Das Absperrventil des Aktivkohlebehlters klemmt geöffnet. Brand | Powertrain |
6Related codes
Browse Pxxx codes or P242xx codes.