Powertrain (Engine & Gearbox)Standard EOBD

P02DE - Cylinder 11 Fuel Injector Offset Learning At Max Limit

Q: What are the symptoms of fault code P02DE?

• Check engine light (MIL) illuminated • Rough idling • Reduced engine performance • Increased fuel consumption • Increased emissions (possible failure at inspection)

Q: What causes fault code P02DE?

• Most likely: Clogged or worn fuel injector (cylinder 11) • Likely: Incorrect IMA/ISA injector coding in the ECU • Possible: High resistance in wiring or connector terminals • Possible: Low fuel pressure at the specific fuel rail • Rare: Mechanical engine issue on cylinder 11 (e.g., low compression)

Q: How do you fix fault code P02DE?

STEP 1: Inspect the fuel injector connector for corrosion or loose pins. STEP 2: Verify that the ISA/IMA calibration code printed on the injector matches the code stored in the ECU using a scan tool. STEP 3: Perform an injector leak-back test to evaluate internal wear. STEP 4: Measure injector resistance (typically 12-14 Ohms for high-resistance or 0.5-2 Ohms for piezo). STEP 5: Reset adaptation values and perform a test drive. If the code returns, replace the injector on cylinder 11.

Last updated:1 February 2026

Related:Fuel Injector Cylinder 11, Engine Control Unit (ECU), Fuel Rail Pressure Sensor, Wiring Harness

System

Powertrain (Engine & Gearbox)

Related Fault Codes

P0200

Injector Circuit Malfunction

P0201

Cylinder 1 Injector Circuit Open

P0202

Injector Circuit - Cylinder 2 - Malfunction

P0203

Injector Circuit - Cylinder 3

Technical Description

P02DE indicates that the Engine Control Unit (ECU) has reached its maximum adaptive limit for fuel injector offset learning on cylinder 11. The ECU monitors crankshaft acceleration during each power stroke to balance fuel delivery between cylinders. If the ECU attempts to increase the injector's pulse width to compensate for a lean condition or injector wear but hits the programmed upper threshold without correcting the balance, this code is triggered. This occurs typically in V12 configurations or heavy-duty specialized engines.

Possible Causes

Clogged or worn fuel injector (cylinder 11)

Incorrect IMA/ISA injector coding in the ECU

High resistance in wiring or connector terminals

Low fuel pressure at the specific fuel rail

Mechanical engine issue on cylinder 11 (e.g., low compression)

Symptoms

Check engine light (MIL) illuminated

Rough idling

Reduced engine performance

Increased fuel consumption

Increased emissions (possible failure at inspection)

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P02DE - Cylinder 11 Fuel Injector Offset Learning At Max Limit

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P02DE - Cylinder 11 Fuel Injector Offset Learning At Max Limit

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