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

P02FD Cold Start Fuel Injection Control Circuit High

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. P02FD means the control circuit reads high – typically the control wire shorted to a supply wire, or a bridged coil. The driver cannot switch the valve as commanded; cold starts become difficult. No manufacturer document using this code was found; unlike the older P0213/P0214, these codes separate the fault types.

Likely causes

Control wire shorted to a supply wire (chafed or pinched)
Short in the cold-start injector or valve
Moisture or corrosion in the connector
Driver stage in the engine module

Symptoms

  • Check engine light on
  • Hard or no start in cold weather (especially with high ethanol)

Repair estimate

DifficultyMediumDIY possible
Parts and labour€50–400
Time0.5–2.5 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

P02FBP02FCP02FEP0213P0214

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