OBD LensWhat do Bank and Sensor mean?
Bank 1 is the side containing cylinder 1. Bank 2 is the other side on V or flat engines; inline engines have only Bank 1. Cylinder numbering depends on the engine, so check the manufacturer’s layout.
For exhaust oxygen sensors, Sensor 1 is upstream, closest to the engine; Sensor 2 is downstream, after the catalyst. Confirm the exact sensor layout in the vehicle’s service information.
Other-bank reference: P20F6. A paired definition does not prove that your engine has both banks.
Generic OBD2: P20F7
Reductant injector, unit 1, bank 2 - valve stuck open
- Reference namespace
- obd2
- Source revision
- legacy-2.2.20
Generic OBD2 definition; confirm the protocol and vehicle-specific service information.
What should I check before using this definition?
Keep the full code, module, status and freeze-frame data. Confirm the vehicle’s make, model, year and current manufacturer service information before choosing a repair. This entry does not identify a failed part by itself.
Organize a scan report or recordingOBD Lens production library legacy-owner-2026-11-02-v84-evidence. This is a scoped technical reference, not a scan of your car. A catalog relationship does not certify that every ECU, year or engine returns the same signal or code definition.
Read the reference methodWhat does P20F7 mean?
Reductant injector, unit 1, bank 2 - valve stuck open. 1 reference families define this identifier: Generic OBD2.
Is P20F7 a generic or manufacturer-specific code?
This code has a generic OBD-II prefix. Confirm the reference scope shown above.
Can P20F7 tell me which part has failed?
This entry does not identify a failed part by itself. Confirm the vehicle’s make, model, year and current manufacturer service information before choosing a repair.