What Does P02EE Mean?
The ECM has detected that the Cylinder 1 fuel injector circuit is operating outside the expected electrical range or performance parameters. The injector driver current, voltage, or response time does not match the calibrated values. This indicates the injector's electrical characteristics have deviated from specification, affecting fuel delivery precision for Cylinder 1.
Common Causes
35%
Degraded Cylinder 1 fuel injector with altered internal coil resistance or sluggish pintle response affecting circuit parameters
25%
High-resistance wiring connection in the Cylinder 1 injector circuit from corroded connectors or damaged wiring
20%
Injector driver circuit issue in the ECM or injector driver module producing incorrect current waveform for Cylinder 1
20%
Incorrect replacement injector installed in Cylinder 1 with different electrical specifications than required
Diagnostic Steps
1
Step 1: Measure Cylinder 1 injector coil resistance at the connector (typically 11-18 ohms for high-impedance, 2-5 ohms for low-impedance). Compare to manufacturer specification and other cylinders.
2
Step 2: Using an oscilloscope with a current clamp, capture the Cylinder 1 injector current waveform during operation. Compare the peak current, hold current, and response time to known-good cylinder waveforms.
3
Step 3: Inspect the Cylinder 1 injector connector and wiring for corrosion, damaged pins, heat damage, or high-resistance connections. Measure voltage drop across the connector under load.
4
Step 4: Swap the Cylinder 1 injector with an adjacent cylinder. If the fault follows the injector, replace it. If it stays at position 1, investigate the wiring and driver circuit.
5
Step 5: Verify the injector part number matches the manufacturer specification. Confirm all injector coding or programming has been performed if the vehicle requires individual injector calibration values.
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The ECM has detected that the Cylinder 1 fuel injector circuit is operating outside the expected electrical range or performance parameters. The injector driver current, voltage, or response time does not match the calibrated values. This indicates the injector's electrical characteristics have devi...
The most common cause of P02EE (Cylinder 1 Injector Circuit Range/Performance) is: Degraded Cylinder 1 fuel injector with altered internal coil resistance or sluggish pintle response affecting circuit parameters
Typical repair costs for P02EE range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Injector circuit range issues cause imprecise fuel delivery leading to rough running, misfire, increased emissions, and potential catalytic converter damage from improper combustion.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P02EE to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Injection System
Difficulty
Type
Generic (SAE)
Recommended Tools
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