Powertrain, generic (extended)

P2A1B Injection Pump Fuel Metering Control E Range/Performance (Cam/Rotor/Injector)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2A1B reports that metering element E works electrically but its result is off: the pressure build-up or quantity attributed to it deviates from what was commanded, or its correction values sit at the limit. How a control module rates this is not published; rail pressure and fuel correction are the obvious inputs. No manufacturer documents P2A1B. Volvo and Mack use the matching range/performance code for B, D and F – three letters for the three pumping injectors of their 13 litre engines; E does not appear there. California's heavy-duty OBD rule requires detecting a fuel system that can no longer deliver the commanded quantity or pressure. Power is cut back, and a worn cam lobe, plunger or valve is a plausible cause.

Likely causes

Worn cam lobe, plunger or valve of metering element E
Insufficient low-pressure supply or clogged filter
Leak in the high-pressure circuit

Symptoms

  • Check engine light on
  • Lack of power under load
  • Longer cranking before start

Repair estimate

DifficultyHardWorkshop job
Parts and labour€150–4,000
Time1–8 h

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

Parts involved

injection pump metering einjection pumpwiring harness

Related codes

P2A1AP2A1CP2A1DP2A17P2A1F

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