P2365 Cylinder 11 Combustion Performance

P2365 means the ECM judges combustion in cylinder 11 to be poor, based on the pressure signal rather than on crankshaft speed alone. No manufacturer publishes this code; twelve-cylinder engines with pressure-sensing glow plugs are not documented. BorgWarner names the purpose of such sensors: letting the controller adjust injection quantity and timing per cylinder in closed loop. If the measured combustion of one cylinder stays outside its window despite that correction, a code of this kind results. CARB ties combustion sensors to stricter misfire detection on diesels. Causes include a fouled or leaking injector, compression loss, an intake air leak or contaminated fuel. Uneven running and more smoke are typical, often alongside P2361, P2362 or the misfire code P0311.

Likely causes

Symptoms

• Check engine light on
• Uneven running and vibration
• More smoke from the exhaust

Repair estimate

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

Related codes

References: law.cornell.edu, borgwarner.com.