OBD-II Error Code P1102 - Cylinder 1 Injector Circuit Open

OBD-II Standard OBD-II Major Fuel Injector

Model: SAE J2012 Extended | Code: P1102

Applicable Systems
OBD-II

Symptoms

The fuel injector for cylinder 1 has an open circuit. The engine will misfire on cylinder 1 and run roughly.

Possible Causes

  • Fuel injector coil open internally
  • Wiring harness open between ECM and injector
  • Injector connector corroded or disconnected
  • ECM injector driver circuit failed
  • Blown injector fuse

Troubleshooting Steps

  1. Step 1: Connect an OBD-II scan tool and read all stored DTCs and freeze frame data
    All DTCs and freeze frame data are retrieved
  2. Step 2: Inspect the related sensor or actuator wiring for damage, corrosion, or loose connections
    Wiring and connectors are in good condition
  3. Step 3: Use a digital multimeter to check sensor voltage, resistance, and reference signals per manufacturer specifications
    Values are within specified range
  4. Step 4: Perform component-level testing of the suspected sensor or actuator
    Component passes or fails definitively
  5. Step 5: Clear codes and road test to verify repair
    Code does not return and system operates normally

How to Reset

To reset code P1102: 1) Repair the underlying fault. 2) Use an OBD-II scan tool to clear the DTC. 3) Perform a drive cycle to verify the monitor completes. 4) If the code returns, further diagnosis is needed.

Frequently Asked Questions

  • Q: What does OBD-II code P1102 mean?

    Code P1102 indicates: Cylinder 1 Injector Circuit Open. This is a Ford manufacturer-specific diagnostic trouble code.

  • Q: Is code P1102 serious?

    Severity: Major. Immediate attention is recommended to prevent further damage.

  • Q: Can I drive with code P1102?

    It is not recommended to drive with this code active as it may cause further damage.

  • Q: How do I fix code P1102?

    Diagnose the Fuel Injector system, check wiring and connectors, test the related sensor or actuator, and replace faulty components as needed.

Related OBD-II Standard Fault Codes

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Source: OBD-II Manufacturer Extended Codes / SAE J2012 / OBD-Codes.com

Category: OBD-II