What Does P02BE Mean?
The ECM has detected that the individual fuel trim correction for cylinder 10 has reached its maximum enrichment limit. The system is adding the maximum allowable fuel to cylinder 10 but still cannot achieve a stoichiometric air/fuel ratio. This code applies to engines with 10+ cylinders (V10, W12, etc.). The driver may notice a misfire on cylinder 10, rough running, hesitation, and reduced power.
Common Causes
30%
Clogged or partially restricted cylinder 10 fuel injector unable to deliver adequate fuel
25%
Vacuum leak at the cylinder 10 intake runner gasket or port allowing unmetered air entry
20%
Faulty cylinder 10 injector electrical circuit reducing pulse width or causing intermittent operation
15%
Low fuel pressure at the rail feeding cylinder 10, particularly on multi-rail systems
10%
Exhaust leak near the cylinder 10 port introducing false lean O2 sensor readings
Diagnostic Steps
1
Review live data for cylinder 10 individual fuel trim — confirm it is at or near the maximum positive correction limit (typically +25% to +30%).
2
Perform a smoke test on the intake manifold focusing on the cylinder 10 intake runner and gasket surfaces.
3
Run an injector balance test by disabling each injector and comparing rpm drops — cylinder 10 should produce a similar drop as the others.
4
Check fuel rail pressure at each rail independently (multi-rail systems common on V10/V12 engines) to ensure the rail feeding cylinder 10 has adequate pressure.
5
Inspect the cylinder 10 injector connector for corrosion or damage, and measure injector resistance (typically 11-17 ohms).
6
Check the fuel rail crossover tube or balance line for restrictions that could starve downstream injectors.
Estimated Repair Cost
$200 - $650
Parts + labor, varies by vehicle and location
The ECM has detected that the individual fuel trim correction for cylinder 10 has reached its maximum enrichment limit. The system is adding the maximum allowable fuel to cylinder 10 but still cannot achieve a stoichiometric air/fuel ratio. This code applies to engines with 10+ cylinders (V10, W12, ...
The most common cause of P02BE (Cylinder 10 - Fuel Trim at Max Limit) is: Clogged or partially restricted cylinder 10 fuel injector unable to deliver adequate fuel
Typical repair costs for P02BE range from $200 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Driveable short distances but extended driving is not recommended. The lean condition causes elevated combustion temperatures risking catalytic converter damage and potential detonation-induced engine damage on cylinder 10.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P02BE to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
Recommended Tools
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