P CODE FAMILY

Powertrain code references — Page 75.

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

Generic OBD-II

P2487

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.

Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 5

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 5

Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 5

Reductant heater A supply low in the GM tank-heater monitor

Reductant heater A supply high relative to the powertrain relay

Reductant heater B supply low in the GM line-heater monitor

A DEF heater sense-high result is a voltage comparison

EGR Cooler Bypass Control Circuit/Open Bank 2

EGR Cooler Bypass Control Circuit Range/Performance Bank 2

EGR Cooler Bypass Control Circuit Low Bank 2

EGR Cooler Bypass Control Circuit High Bank 2

EGR Cooler Bypass Position Sensor Circuit Bank 1

EGR bypass tracking depends on completed offset learning

Low EGR bypass feedback is different from a closed valve

High bypass-sensor voltage does not establish full opening

EGR Cooler Bypass Position Sensor Circuit Intermittent/Erratic Bank 1

EGR Cooler Bypass Position Sensor Circuit Bank 2

EGR Cooler Bypass Position Sensor Range/Performance Bank 2

EGR Cooler Bypass Position Sensor Circuit Low Bank 2

EGR Cooler Bypass Position Sensor Circuit High Bank 2

EGR Cooler Bypass Position Sensor Circuit Intermittent/Erratic Bank 2

reductant pressure takes too long to enter closed-loop control

closed-loop reductant estimate indicates insufficient dosing

closed-loop reductant estimate indicates excessive dosing

DPF regeneration spends too little time in closed-loop control

DPF regeneration temperature remains below its target

DPF regeneration temperature exceeds its target

Incomplete DPF regeneration is judged by soot remaining afterward

Particulate Filter Restriction - Soot Accumulation Bank 2

DPF loading reaches the severe restriction threshold

The EGR bypass fails to return after drive is removed

EGR Cooler Bypass Control Stuck/Open Bank 2

EGR Cooler Coolant Pump Control Circuit/Open

EGR Cooler Coolant Pump Performance/Stuck Off

EGR Cooler Coolant Pump Control Circuit Low

EGR Cooler Coolant Pump Control Circuit High

EGR Cooler Coolant Pump Stuck On

EGR Cooler Coolant Pump Feedback Circuit Low

EGR Cooler Coolant Pump Feedback Circuit High

Particulate-sensor current stays too high after sensor regeneration

particulate sensor state feedback disagrees with its command

particulate sensor electrode response is too small

particulate sensor electrode signal shorted to power

Particulate Matter Sensor Circuit Intermittent

The particulate-sensor heater is checked while regeneration heating is on

Unexpected heater voltage appears while the particulate sensor is measuring

particulate sensor heater reports a ground-short condition

particulate sensor heater remains electrically active when off

Particulate-sensor heater resistance changes with temperature

EVAP System Leak Detection Pump Pressure Sensor Circuit

EVAP pressure correlation compares the vented system with ambient pressure

Leak-detection pressure sensor voltage is below its electrical range

Leak-detection pressure sensor voltage exceeds its upper boundary

EVAP System Leak Detection Pump Pressure Sensor Circuit Intermittent

EVAP System Leak Detection Pump Switching Valve Control Circuit/Open

EVAP System Leak Detection Pump Switching Valve Control Circuit Low

EVAP System Leak Detection Pump Switching Valve Control Circuit High

EVAP System Leak Detection Pump Switching Valve Stuck On

EVAP System Leak Detection Pump Switching Valve Performance/Stuck Off

Super Duty exhaust-temperature faults and the PCM software case

Exhaust Gas Temperature Measurement System - Multiple Sensor Correlation Bank 2

An EGR bypass learning limit is not the normal travel limit

EGR Cooler Bypass Position Sensor Exceeded Learning Limit Bank 2

Particulate-sensor temperature circuit faults use electrical limits

particulate sensor temperature disagrees with its model

Particulate Matter Sensor Temperature Circuit Low

particulate sensor temperature circuit reports an electrical fault

Particulate Matter Sensor Temperature Circuit Intermittent

Reductant Tank Cap Switch Circuit

Reductant Tank Cap Switch Circuit Range/Performance

Reductant Tank Cap Switch Circuit Low

Reductant Tank Cap Switch Circuit High

Reductant Tank Cap Switch Circuit Intermittent/Erratic

Particulate-sensor supply voltage is judged by voltage drop under heater demand

particulate sensor regeneration does not achieve its thermal goal

Reductant Heater A Sense Circuit

Reductant Heater B Sense Circuit

EGR Cooler Coolant Pump Feedback Circuit

EVAP System Pressure Sensor/Switch B Circuit

EVAP System Pressure Sensor/Switch B Circuit Range/Performance