BMW P1421: Secondary Air Injector Valve Circuit Short to Ground
Is your scanner showing BMW P1421?
No worries. We'll show you what it means and how to deal with it.
BMW P1421: Secondary Air Injector Valve Circuit Short to Ground
OVERVIEWWhat Does The BMW P1421 Code Mean?
The Engine Control Module detects a short circuit to ground when activating the secondary air injection solenoid valve. The air mass is greater than 12 but less than 152 m kg/h, coolant temperature is greater than 3 but less than 75 degrees Celsius.
What Are The Potential Causes Of The BMW P1421 Code?
- Connector to the secondary air injection valve is loose or disconnected
- Secondary air injector valve circuit short
- Secondary air injector valve circuit is open
- Faulty secondary air injector valve
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> Dorman 911-975 Secondary Air Injection Check Valve Compatible with Select BMW Models
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
BMW Fault Codes (DTCs), page 15.
