What Does P02DE Mean?
The ECM has detected that Cylinder 10 fuel injector offset learning correction has reached its minimum allowable limit. The adaptive fuel control is subtracting maximum fuel from Cylinder 10 but the over-fueling exceeds the correction range. Applicable to V10 and V12 engines, Cylinder 10 is delivering more fuel than commanded and the ECM can no longer compensate through normal offset learning.
Common Causes
40%
Leaking or stuck-open Cylinder 10 fuel injector delivering excess fuel beyond the ECM adaptive correction capability
25%
Mismatched replacement injector installed in Cylinder 10 with a higher flow rate than the original matched set
20%
Elevated fuel rail pressure from a faulty pressure regulator or fuel pump on the bank feeding Cylinder 10
15%
Carbon or varnish deposits on Cylinder 10 injector nozzle altering spray pattern and increasing delivered fuel volume
Diagnostic Steps
1
Step 1: Retrieve injector offset learning values for all cylinders. Confirm Cylinder 10 has the most negative offset, indicating the ECM is maximally reducing its fuel delivery.
2
Step 2: Monitor Cylinder 10 fuel contribution and compare to other cylinders on the same bank at idle and 2500 RPM to quantify the rich bias.
3
Step 3: Swap Cylinder 10 injector with an adjacent cylinder on the same fuel rail, clear adaptations, and complete a relearn drive cycle to isolate the fault.
4
Step 4: Verify fuel rail pressure on the bank feeding Cylinder 10 using a mechanical gauge. Check for regulator malfunction or fuel pump over-pressure conditions.
5
Step 5: If the injector tests normal, perform a compression and leak-down test on Cylinder 10 to identify any mechanical conditions biasing the offset learning.
Estimated Repair Cost
$200 - $750
Parts + labor, varies by vehicle and location
The ECM has detected that Cylinder 10 fuel injector offset learning correction has reached its minimum allowable limit. The adaptive fuel control is subtracting maximum fuel from Cylinder 10 but the over-fueling exceeds the correction range. Applicable to V10 and V12 engines, Cylinder 10 is deliveri...
The most common cause of P02DE (Cylinder 10 Fuel Injector Offset Learning At Min Limit) is: Leaking or stuck-open Cylinder 10 fuel injector delivering excess fuel beyond the ECM adaptive correction capability
Typical repair costs for P02DE range from $200 to $750, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Over-fueling Cylinder 10 can damage the catalytic converter from excess unburned fuel, wash cylinder walls reducing lubrication, and cause elevated emissions on V10/V12 engines.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P02DE to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Injection System
Difficulty
Type
Generic (SAE)
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