P21A2: Cylinder 7 is getting a different mixture from the others
Cylinder 7 is getting a different mixture from the others. It is usually its injector or an air leak next to that cylinder.
| Code | P21A2 |
|---|---|
| System | Engine and transmission |
| Group | P21xx, Throttle, injection and emissions |
| Type | Generic: it means the same on every make |
How to read and clear P21A2 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P21A2 with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P219E Cylinder 3 is getting a different mixture from the others
- P219F Cylinder 4 is getting a different mixture from the others
- P21A0 Cylinder 5 is getting a different mixture from the others
- P21A1 Cylinder 6 is getting a different mixture from the others
- P21A3 Cylinder 8 is getting a different mixture from the others
- P21A4 Cylinder 9 is getting a different mixture from the others
- P21A5 Cylinder 10 is getting a different mixture from the others
- P21A6 Cylinder 11 is getting a different mixture from the others
- P2100 Throttle actuator A control motor circuit open
- P2101 Throttle actuator A control motor circuit range or performance
- P2102 Throttle actuator A control motor circuit low
- P2104 Throttle control system: forced idle
What does code P21A2 mean?
Cylinder 7 is getting a different mixture from the others. It is usually its injector or an air leak next to that cylinder.
How do you clear P21A2?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P21A2 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
