Powertrain, generic (extended)

P2A1C Injection Pump Fuel Metering Control E Low (Cam/Rotor/Injector)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2A1C is set when the drive circuit of the fifth metering element, E, reads below its permitted range. On solenoid-operated pump valves and unit injectors, a wire grounded against the engine block, water in a connector or a broken lead on the ground-switched side are typical. Because only a few injection layouts have five or more separately controlled elements, the code is rare, and no manufacturer documents it publicly. California's comprehensive component monitoring demands checking every such output for breaks and for values outside its range. Saab's two-valve V6 diesel pump of 2002 gives an analogy: a grounded or open common supply (P0258) restricts fuel quantity and rail pressure. Element E's high-side and functional faults are P2A1D and P2A1B.

Likely causes

Wire of element E rubbing on the engine block and grounded
Moisture or corrosion in the connector of element E
Broken lead on the ground-switched side

Symptoms

  • Check engine light on
  • Reduced power or limp mode
  • Rough running

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–1,500
Time0.5–4 h

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

Parts involved

injection pump metering einjection pumpwiring harness

Related codes

P2A1AP2A1BP2A1DP2A18P2A20

References: law.cornell.edu, saabwisonline.com, saabwisonline.com.