Powertrain, generic (extended)

P2A16 Injection Pump Fuel Metering Control D (Cam/Rotor/Injector)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Wiring or connector fault in the circuit of element D
Metering element D (valve, pumping unit or injector solenoid) defective
Engine control module fault or software error

Symptoms

  • Check engine light on
  • Reduced power
  • Hard starting or uneven running

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–3,000
Time0.5–8 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

injection pump metering dinjection pumpwiring harness

Related codes

P2A17P2A18P2A19P2A12P2A1A

References: law.cornell.edu, law.cornell.edu, static.nhtsa.gov, fleetmaintenance.com.