Powertrain, generic (extended)

P2DE0 Cold Start Fuel Injection Quantity C Lower Than Expected

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P2DE0 is the cold-start shortfall for path C. Its partner P2DE1 is used by Honda, which treats it as a rich fault of its cold-start mixture control: that check compares the ratio the PCM commands just after a cold start with what the wide-band sensor measures. By the logic of the pair, P2DE0 would be the lean side, but no public Honda or other maker document covers P2DE0 itself. For petrol engines, CARB section 1968.2 (e)(11.1.3) requires cold-start faults to be stored apart from the same faults found later. Fuel shortfall when cold can stem from low fuel pressure, an air leak behind the airflow meter or injectors that atomise poorly; stalling or stumbling soon after starting is typical. P2DDC is the warm counterpart.

Likely causes

Fuel pressure too low at start (pump, regulator, check valve)
Unmetered air entering behind the airflow meter
Injectors of group C dirty, poor spray when cold
Cold-start calibration in engine control software

Symptoms

  • Check engine light on after a cold start
  • Stalling or stumbling shortly after a cold start
  • Long cranking when cold

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–2,500
Time0.5–4 h

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

Parts involved

fuel injector group coxygen sensorecm

Related codes

P2DE1P2DDCP2DD7P2DE2P027E

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