P2A21: Injection Pump Fuel Metering Control F High (Cam/Rotor/Injector)
Single source — subject not independently confirmed
Most codes here are written only once two independent sources agree on what they mean. This one rests on a single source, checked against the codes around it — its family, its block and its neighbours all fit. That makes the subject below likely rather than established, so we have deliberately left out the severity rating, the repair advice and the likely-causes list that a confirmed code carries.
If you have met this code on a real car, what you know is worth more than what we have — please post it below.
What this code means
This code concerns fuel metering inside the injection pump itself. On a rotary or unit-injector pump the metering happens in the pump rather than at the injector, so this family names the cam, rotor or element rather than a nozzle. The corpus documents the closest confirmed member of this family at P0087.
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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