P CODE FAMILY

Powertrain code references — Page 71.

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

Generic OBD-II

P22F7

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 8 Alternative Fuel Injector Control Circuit High

Cylinder 8 Alternative Fuel Injector Control Circuit Range/Performance

A slow NOx rise can fail by initial delay or slower subsequent response

upstream NOx response is evaluated during a fuel-cut transition

engine-out NOx signal disagrees with its model

NOx Sensor Performance - Slow Response Low to High Bank 1 Sensor 2

NOx Sensor Performance - Slow Response High to Low Bank 1 Sensor 2

post-catalyst NOx sensing-cell self-test fails

Ford SCR inlet temperature stays below its target

Cylinder 1 ignition control circuit has a low electrical fault

Cylinder 1 ignition control circuit shows a power-short signature

Cylinder 1 ion-sensing circuit and secondary ignition diagnosis

Cylinder 2 ignition control is diagnosed electrically low

Cylinder 2 ignition output remains high in the monitored on state

Cylinder 2 ion-sensor signal error at lower engine speed

Cylinder 3 ignition control has a ground-short signature

Cylinder 3 ignition control fails its high-circuit check

Cylinder 3 ion-sensor input error and the P0303 decision

A coil low-circuit fault with an unresolved channel label

Cylinder 1 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Cylinder 2 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Cylinder 3 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Cylinder 4 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Cylinder 5 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Cylinder 6 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Why a coil high-circuit code needs a verified channel mapping

Cylinder 4 secondary-ignition code interpreted through ion sensing

Why a low ignition-driver signal needs its command state

Interpreting an ignition output that stays high when commanded on

Ignition Coil E Secondary Circuit

Separating ignition circuit low from a combustion misfire

Why ignition-driver high is judged during an on command

Ignition Coil F Secondary Circuit

Understanding the coil G off-state low-voltage check

Coil G circuit high and the significance of the active command

Cylinder 7 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Cylinder 8 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Cylinder 9 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Cylinder 10 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Cylinder 11 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Cylinder 12 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Ignition Coil G Secondary Circuit

A low ignition-control signal with an unresolved coil label

Reading an ignition circuit-high code without guessing the cylinder

Ignition Coil H Secondary Circuit

Coil-driver low evidence depends on ignition architecture

Ignition Coil I Primary Control Circuit High

Ignition Coil I Secondary Circuit

Ignition Coil J Primary Control Circuit Low

Ignition Coil J Primary Control Circuit High

Ignition Coil J Secondary Circuit

TCM Request - Forced Engine Shutdown

Cylinder 11 Fuel Injector A Offset Learning At Min Limit

Cylinder 11 Fuel Injector A Offset Learning At Max Limit

Cylinder 12 Fuel Injector A Offset Learning At Min Limit

Cylinder 12 Fuel Injector A Offset Learning At Max Limit

O2 Sensor Out of Range During Deceleration Bank 1 Sensor 2

Ignition Coil K Primary Control Circuit Low

Ignition Coil K Primary Control Circuit High

Ignition Coil K Secondary Circuit

Ignition Coil L Primary Control Circuit Low

Ignition Coil L Primary Control Circuit High

Ignition Coil L Secondary Circuit

Cylinder 1 Above Knock/Combustion Vibration Sensor Threshold

Cylinder 2 Above Knock/Combustion Vibration Sensor Threshold

Cylinder 3 Above Knock/Combustion Vibration Sensor Threshold

Cylinder 4 Above Knock/Combustion Vibration Sensor Threshold

fuel metering valve 2 open-load detection

fuel metering valve 2 low-side short to ground

fuel metering valve 2 low-side short to power

Fuel Pressure Regulator B Solenoid Supply Voltage Control Circuit/Open

A low regulator supply circuit can create a high voltage drop across its driver

A regulator supply-high fault is assessed across an off-state driver

Cylinder 5 Above Knock/Combustion Vibration Sensor Threshold

Cylinder 6 Above Knock/Combustion Vibration Sensor Threshold

Cylinder 7 Above Knock/Combustion Vibration Sensor Threshold

Cylinder 8 Above Knock/Combustion Vibration Sensor Threshold

Cylinder 9 Above Knock/Combustion Vibration Sensor Threshold

Cylinder 10 Above Knock/Combustion Vibration Sensor Threshold

Cylinder 11 Above Knock/Combustion Vibration Sensor Threshold