P02F3 medium Severity

P02F3: Cylinder 6 Injector Circuit Range/Performance

Can cause rough idle, misfire, decreased power, increased fuel consumption and emissions; may worsen over time.

Overview

P02F3 indicates an out-of-range performance condition in the fuel injector circuit for cylinder 6 where the ECM detects abnormal electrical or operational behavior in that injector’s control.

Common Symptoms

  • Check Engine Light illuminated
  • Rough engine idle or misfire
  • Reduced engine performance or power
  • Decreased fuel economy
  • Possible fuel smell or increased emissions

Most Common Causes

Faulty fuel injector on cylinder 6 medium

Injector may be clogged, internally shorted/open, or not responding within expected parameters.

Damaged or corroded wiring/connector in injector circuit high

Open, short, loose or corroded terminals in the harness can cause out-of-range signals.

Engine Control Module (ECM) injector driver malfunction medium

ECM driver circuit fault can falsely report incorrect injector performance; less common.

Fuel delivery issues reducing effective injector performance low

Low rail pressure or fuel supply issues may mimic injector circuit problems.

Diagnostic Steps

  1. Perform OBD-II scan and note any additional related codes (e.g., misfires).
    Expected: P02F3 present; possibly additional injector or misfire codes.
    Interpretation: Additional codes may help narrow down if issue is isolated to electrical or combustion.
  2. Visually inspect cylinder 6 injector wiring and connector.
    Expected: No damaged wires, corrosion, poor connection or pin issues.
    Interpretation: Issues found here often indicate harness or connector repair is needed.
  3. Measure injector coil resistance and compare to spec.
    Expected: Resistance within manufacturer specification.
    Interpretation: Out-of-spec resistance suggests faulty injector.
  4. Check injector pulse/control signal with oscilloscope or noid light.
    Expected: Consistent pulse signal during cranking/running.
    Interpretation: Absent or irregular signal points to ECM or wiring fault.
  5. If electrical checks pass, perform fuel delivery tests (fuel pressure, flow).
    Expected: Fuel pressure within spec.
    Interpretation: Low pressure may indicate fuel supply issue affecting injector performance.

Repair Solutions

Repair or replace damaged wiring/connectors in injector circuit medium
Estimated Cost: $50 - $300

Costs vary based on access and extent of wiring damage.

Replace cylinder 6 fuel injector medium
Estimated Cost: $150 - $600

OEM vs aftermarket parts and labor affect total cost.

ECM injector driver repair or replacement hard
Estimated Cost: $500 - $1200

Only if confirmed faulty after all other diagnostics.

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Assuming the injector itself is bad without testing wiring or ECM
  • Attributing rough running to ignition or air intake issues without confirming fuel injection data

Frequently Asked Questions

What does the P02F3 code mean?

Technically, the P02F3 code represents Cylinder 6 Injector Circuit Range/Performance. It usually points to a fault within the Fuel System.

How serious is the P02F3 code?

The P02F3 code is considered medium severity. Can cause rough idle, misfire, decreased power, increased fuel consumption and emissions; may worsen over time.

Symptoms associated with DTC P02F3

Drivers often report: Check Engine Light illuminated, Rough engine idle or misfire, Reduced engine performance or power when this code is present.

Common triggers for the P02F3 error

Potential culprits include: Faulty fuel injector on cylinder 6, Damaged or corroded wiring/connector in injector circuit, Engine Control Module (ECM) injector driver malfunction. A proper diagnosis is recommended.

Repair cost breakdown for P02F3

The cost varies significantly based on the root cause. For example, replacing a Repair or replace damaged wiring/connectors in injector circuit typically costs between $50 and $300, while fixing a ECM injector driver repair or replacement can range from $500 to $1200.

Is the P02F3 code specific to Chevrolet?

Yes, P02F3 is a generic code that applies to all OBD-II compliant vehicles, including Ford, Toyota, Honda, Chevrolet, Nissan, Dodge, BMW, and more.

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