P CODE FAMILY

Powertrain code references — Page 8.

Engine, transmission and powertrain diagnostic references. Exact vehicle and module context still matters.

Generic OBD-II

P02BD

These are code references, not a list of confirmed faults on every vehicle. Read the source and applicability notes, then match the exact vehicle, year, engine and scan report.

Cylinder 9 - Injector Leaking

Cylinder 10 - Fuel Trim at Max Limit

Cylinder 10 - Fuel Trim at Min Limit

Cylinder 10 - Injector Restricted

Cylinder 10 - Injector Leaking

Cylinder 11 - Fuel Trim at Max Limit

Cylinder 11 - Fuel Trim at Min Limit

Cylinder 11 - Injector Restricted

Cylinder 11 - Injector Leaking

Cylinder 12 - Fuel Trim at Max Limit

Cylinder 12 - Fuel Trim at Min Limit

Cylinder 12 - Injector Restricted

Cylinder 12 - Injector Leaking

Overboost compares pressure with a changing request

bank-2 underboost monitoring and a calibration caveat

cylinder 1 reaches the minimum injection-learning limit

cylinder 1 exceeds its upper injector-learning boundary

understanding cylinder 2 minimum SQP authority

cylinder 2 maximum injector offset in the SQP map

cylinder 3 correction below the SQP learning floor

why cylinder 3 can reach maximum learned injector correction

cylinder 4 minimum injector-learning authority

cylinder 4 learning exceeds maximum energizing-time authority

what cylinder 5 minimum offset learning actually measures

cylinder 5 upper-limit SQP adaptation

cylinder 6 reaches a lower SQP adaptation boundary

cylinder 6 maximum learned injector-time correction

A cylinder 7 learning limit can remain stored at one rail-pressure level

Cylinder 7 maximum adaptation is a map-wide finding

Cylinder 8 minimum offset is more than the latest correction number

Cylinder 8 upper offset learning requires checking retained saturation states

Cylinder 9 Fuel Injector A Offset Learning At Min Limit

Cylinder 9 Fuel Injector A Offset Learning At Max Limit

Cylinder 10 Fuel Injector A Offset Learning At Min Limit

Cylinder 10 Fuel Injector A Offset Learning At Max Limit

diesel throttle open-load detection with the driver off

diesel throttle cannot track its requested position

throttle short-to-ground detection uses H-bridge current

diesel throttle short-to-power hardware indication

A diesel throttle jammed result requires active position control

throttle fails to return to its default open position

Diesel Intake Air Flow A Position Sensor Circuit

Diesel throttle position does not follow its target

diesel throttle SENT position signal below range

throttle SENT feedback exceeds its upper electrical range

Diesel Intake Air Flow A Position Sensor Circuit Intermittent/Erratic

excessive current through the diesel throttle motor

High intake airflow is a closed-loop air-mass control discrepancy

Low intake airflow must be compared with the controller’s target

Cylinder 1 injector opening and closing inferred from voltage feedback

Cylinder 2 injector feedback can be present but implausible

Cylinder 3 injector feedback during sufficiently long pulses

injector 4 current takes too long or too little time to fall

cylinder 5 end-of-injection current-decay performance

injector 6 current-fall timing in the 25OBDG04B monitor

Cylinder 7 injector performance can concern an internal ADC buffer

Cylinder 8 injector performance uses event-based signal plausibility

Cylinder 9 Injector Circuit Range/Performance

Cylinder 10 Injector Circuit Range/Performance

Cylinder 11 Injector Circuit Range/Performance

Cylinder 12 Injector Circuit Range/Performance

Learned endstop failure must be checked after learning completes

Cold Start Fuel Injection Control Circuit/Open

Cold Start Fuel Injection Control Circuit Low

Cold Start Fuel Injection Control Circuit High

Cold Start Fuel Injection Control Circuit Range/Performance

Propulsion System Inactive Timer Performance

How crankshaft motion becomes evidence of random misfire

cylinder-1 misfire evidence across different observation windows

cylinder-2 attribution is not a single-component diagnosis

cylinder-3 misfire and weighted catalyst assessment

cylinder-4 misfire after startup qualification

cylinder-5 misfire rates and cold-start eligibility

cylinder-6 misfire needs valid timing information

cylinder-7 misfire counts versus an exhaust-bank total

cylinder-8 misfire and completed test frames

Cylinder 9 Misfire Detected

Ignition A Control Signal Circuit/Open

Ignition A Control Signal Circuit Low

Ignition A Control Signal Circuit High