Powertrain, generic · Fuel and air metering (injector circuit)

P02FB Cold Start Fuel Injection Control Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

Cold start fuel injection is an extra injection system for cold starts – for example on flex-fuel engines running on high ethanol blends, where a Hyundai patent describes a small auxiliary tank, a cold-start injector and a heater. CARB lists such heated fuel preparation systems among the monitored output components. P02FB means the control circuit of the cold-start injection is open or has a general fault – a broken coil, a loose or corroded connector or a broken wire. The engine then starts poorly or not at all in the cold; once warm it runs normally. No manufacturer document using this code was found; unlike the older P0213/P0214, these codes separate the fault types.

Likely causes

Coil of the cold-start injector or valve open
Connector loose, corroded or pin pushed back
Broken wire in the harness
Fuse or relay of the cold-start system
Driver stage in the engine module

Symptoms

  • Check engine light on
  • Hard or no start in cold weather (especially with high ethanol)
  • Rough running right after a cold start

Repair estimate

DifficultyMediumDIY possible
Parts and labour€50–400
Time0.5–2 h

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

Parts involved

cold start injectorcold start fuel systeminjector wiring

Related codes

P0213P0214P02FCP02FDP02FE

References: law.cornell.edu, patents.google.com.