What Does P02D7 Mean?
The ECM has detected that Cylinder 6 fuel injector offset learning correction has reached its maximum allowable limit. The PCM is adding the maximum permissible fuel to Cylinder 6 but the under-fueling exceeds the adaptive correction range. Cylinder 6 is delivering significantly less fuel than commanded, indicating a restricted injector or localized lean condition on that cylinder.
Common Causes
40%
Partially clogged or internally restricted Cylinder 6 fuel injector with reduced flow from deposits or contamination
25%
Degraded Cylinder 6 injector solenoid coil with elevated resistance causing incomplete pintle opening
20%
Low fuel system pressure from a weak fuel pump or partially restricted fuel filter reducing Cylinder 6 delivery
15%
Vacuum leak at Cylinder 6 intake runner or manifold gasket causing unmetered air ingestion
Diagnostic Steps
1
Step 1: Review all cylinder injector offset learning values. A strongly positive Cylinder 6 offset confirms under-fueling. Compare against other cylinders on the same bank.
2
Step 2: Perform an injector flow bench test or use a noid light test to verify Cylinder 6 injector is receiving proper driver signals and flowing within 5% of the set average.
3
Step 3: Swap Cylinder 6 injector with another cylinder on the same fuel rail, clear adaptations, and complete a relearn cycle. If the lean fault follows the injector, replace it.
4
Step 4: Smoke test the intake manifold around Cylinder 6 for vacuum leaks. On V-configuration engines, pay attention to the rear-most runner seals which are often harder to access and inspect.
5
Step 5: Measure fuel rail pressure at idle and under load to ensure the fuel supply system maintains adequate pressure and volume to all cylinders.
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
The ECM has detected that Cylinder 6 fuel injector offset learning correction has reached its maximum allowable limit. The PCM is adding the maximum permissible fuel to Cylinder 6 but the under-fueling exceeds the adaptive correction range. Cylinder 6 is delivering significantly less fuel than comma...
The most common cause of P02D7 (Cylinder 6 Fuel Injector Offset Learning At Max Limit) is: Partially clogged or internally restricted Cylinder 6 fuel injector with reduced flow from deposits or contamination
Typical repair costs for P02D7 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Persistent under-fueling on Cylinder 6 causes lean misfires, elevated exhaust temperatures, and potential catalytic converter overheating. The engine may exhibit rough idle and reduced power.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P02D7 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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