P CODE FAMILY

Powertrain code references — Page 50.

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

Buick / Cadillac +7

P1415

Diagnostic Module Tank Leakage DM-TL Switching Solenoid Control Circuit Signal Low

PowertrainRead the code

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.

Bank-1 secondary-air response fails while bank 2 passes

Air Pump Circuit

Bank-2 secondary-air response and a catalog-label correction

Port Air Circuit

Port Air Relief Circuit

Fuel Level Sensor Signal Too Low

Secondary Air Injection System Relay A Control Circuit High

Split Air 1 Circuit

Fuel Level Sensor Signal Too High

Split Air 2 Circuit

Secondary Air Valve Control Circuit Electrical

Intake Air Low Pressure Switch Circuit Low Voltage

Fuel Tank Pressure Control Solenoid High Input

distinguish the N112 electrical fault from a generic module label

Secondary Air System Bank 1

Intake Air Low Pressure Switch Circuit High Voltage

Exhaust Gas Recirculation Circuit High Input

N112 short-to-ground indication also warrants relay assessment

Secondary Air System Bank 2

EVAP Purge Control Solenoid Valve Circuit High Input

interpret the secondary-air valve's short-to-positive fault

Intake Air High Pressure Switch Circuit High Voltage

EVAP Vent Control High Input

Volkswagen secondary-air bank 1 low flow: distinguish air and vacuum paths

Volkswagen secondary-air bank 1 leak and the combination valve

EVAP Purge Control Solenoid Circuit Low Voltage

The N80 purge-control circuit is shorted to ground

Volkswagen N80 purge-valve open circuit and the J17 relay check

Secondary-tank fuel level does not change as expected

Misfire Monitor Disabled Unable to Learn Trigger Wheel Profile

Secondary Air Injection System Incorrect Flow Detected

Secondary fuel-level signal remains electrically low

Secondary Air Injection Valve Open

Fuel Level Sensor 2 Circuit High Voltage

Volkswagen secondary-air relay J299 open circuit

The secondary-air pump relay circuit is shorted to B+

Secondary-air pump relay control is shorted to ground

An electrical fault in the secondary-air pump relay circuit

Purge Control Valve Control Open Circuit

Purge Control Valve Control Circuit Signal Low

Floor Temp Switch Circuit

Volkswagen EGR position adaptation and a failed basic setting

Purge Control Valve Control Circuit Signal High

Purge Valve Stuck Open

Maxima small-leak diagnosis uses positive tank pressure

Fuel Tank Pressure Control System Low Input

EGR Valve Power Stage Open

Leakage Diagnostic Pump Control Open Circuit

Evaporative Emission (EVAP) System Flow During Non-Purge

ELC System 1

the 2001 Altima uses this code for a very small EVAP leak

Fuel Tank Pressure Control System High Input

EGR Valve Circuit Open Short To Ground

Leakage Diagnostic Pump Control Circuit Signal Low

EVAP Vacuum Switch High Voltage During Ignition On

Secondary Air Injection System Monitor Circuit High Voltage

Subaru fuel-level performance problem 2

EGR Valve Position Sensor Signal Too High

Leakage Diagnostic Pump Control Circuit Signal High

Ford purge-flow diagnosis changes with the EVAP application

EVAP System Purge Flow Fault

EVAP Purge Control Solenoid 2 Circuit Fault

EVAP Canister Control Vacuum Switch Circuit Fault

EVAP Control System Vent Control Function Problem

EGR Valve Position Sensor Signal Too Low

Diagnostic Module Tank Leakage DM-TL Pump Control Open Circuit

Purge Flow Sensor Circuit Input Low

EVAP Purge Flow Sensor Circuit Low Voltage

Altima detects purge when the valve should be closed

EGR Valve Position Sensor Range Performance

Diagnostic Module Tank Leakage DM-TL Pump Control Circuit Signal Low

Ford purge-flow sensor circuit fault versus inadequate purge flow

EVAP Purge Flow Sensor Circuit High Voltage

EVAP Canister Purge Volume Control Valve

Catalyst Temperature Sensor 2 Circuit Range Performance

Diagnostic Module Tank Leakage DM-TL Pump Control Circuit Signal High

Evaporative Vacuum Solenoid Circuit

Altima vent restriction can imitate a valve stuck closed

Catalyst Temperature Circuit Short To Ground

Diagnostic Module Tank Leakage DM-TL Pump Too High During Switching