P2A16 code meaning
Injection Pump Fuel Metering Control D (Cam/Rotor/Injector)
Powertrain system Generic code P2Axx codes Check engine light
What P2A16 means
P2A16 is the umbrella code for fuel metering element D, used when the control module registers a malfunction of that element without assigning it to the more specific plausibility, low or high codes (P2A17–P2A19). The D series only makes sense on systems with at least four individually controlled metering elements, such as engines whose camshaft drives several pumping units. On Volvo and Mack 11 and 13 litre truck engines from model year 2018, three of the six injectors are cam-actuated pumping injectors feeding the common rail; Volvo bulletins refer to D, though only with P2A17, not P2A16. A public description of P2A16 itself is missing, so the general CARB circuit and fuel system rules apply. Expect reduced power and a stored code with freeze frame.
P2A16 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 8 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2A16
- Check engine light on
- Reduced power
- Hard starting or uneven running
Common causes of P2A16
- Most likelyWiring or connector fault in the circuit of element D
- PossibleMetering element D (valve, pumping unit or injector solenoid) defective
- Less likelyEngine control module fault or software error
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Injection pump metering dInjection pumpWiring harness
What each part of P2A16 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| A | Area: hybrid propulsion. |
| 16 | The exact fault in that area. |
What to do next
- Note P2A16 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2A16
What does P2A16 mean?
P2A16 means "Injection Pump Fuel Metering Control D (Cam/Rotor/Injector)". P2A16 is the umbrella code for fuel metering element D, used when the control module registers a malfunction of that element without assigning it to the more specific plausibility, low or high codes (P2A17–P2A19). It is a generic code, so it means the same on every make.
Is it safe to drive with P2A16?
Drive gently and only to a workshop. With P2A16 the car can go into limp mode (reduced power) to protect itself.
Will P2A16 fail an emissions test?
Yes, it can. P2A16 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2A16 to fix?
Difficulty: hard. A typical repair takes 0.5 to 8 hours of work. This is a job for a workshop.
Will P2A16 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.