P CODE FAMILY

Powertrain code references — Page 53.

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

Subaru

P1511

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.

Idle Air Control Solenoid Signal 1 Circuit High Input

Boost Pressure Low

Intake Manifold Changeover Valve Circuit Electrical Malfunction

DISA Control Circuit Signal Low

Intake Manifold Runner Control Stuck Closed

Idle Air Control Solenoid Signal 2 Circuit Low Input

Boost Pressure High

Intake Manifold Changeover Valve Circuit Short To B+

DISA Control Circuit Signal High

Intake Manifold Runner Control Stuck Closed

Idle Air Control Valve Closing Coil Low Voltage

Idle Air Control Solenoid Signal 2 Circuit High Input

Intake Manifold Changeover Valve 2 Circuit Short To B+

Throttle Body Performance

High Load Neutral Drive Fault

Idle Air Control Solenoid Signal 3 Circuit Low Input

Intake Manifold Changeover Valve 2 Circuit Short To Ground

Control Module Throttle Actuator Position Performance

A/T To M/T Codification

Idle Air Control Solenoid Signal 3 Circuit High Input

Intake Manifold Changeover Valve Circuit Short To Ground

Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

Intake Manifold Runner Control Input Error

Gear Change Neutral Drive Fault

Idle Air Control Solenoid Signal 4 Circuit Low Input

Intake Manifold Changeover Valve Circuit Open

Throttle Actuator Control (TAC) Module Performance

Intake Manifold Runner Control Input Error

Cranking Neutral Drive Fault

Idle Air Control Solenoid Signal 4 Circuit High Input

Main Relay Circuit Electrical Malfunction

Throttle Actuator Control (TAC) Module Serial Data Circuit

Intake Manifold Runner Control Fault Stuck Open

Starter Switch Circuit Low Input

Main Relay Circuit Short To B+

A Camshaft Position Actuator Bank 1

Electronic Throttle Module Low Volts Communication Disable

IAC Valve Circuit Failure

Intake Camshaft Control Bank 1 Malfunction

B Camshaft Position Actuator Bank 1

Gear Indicator System

Stop Lamp Switch Circuit

Stop Lamp Switch Malfunction

Cruise Control Switch S40

Radiator Fan Relay 1 Circuit High Input

Stop Lamp Switch Signal Malfunction

Intake Manifold Changeover Valve 2 Circuit Open

Transmission Engaged At High Throttle Angle

Intake Manifold Changeover Valve 2 Circuit Electrical Malfunction

A Camshaft Position Actuator Bank 2

Park/Neutral To Drive/Reverse At High RPM

Intake Camshaft Control Bank 2 Malfunction

A Camshaft Position Actuator Signal Low Bank 1

Electronic Throttle Control Throttle Return

VICS Solenoid Valve

Crash Signal From Airbag Control Unit Range Performance

A Camshaft Position Actuator Signal High Bank 1

TP Sensor Learned CI Throttle Angle Out Of Range

A Camshaft Position Actuator Control Open Circuit Bank 1

Throttle Body Service Required

Intake Camshaft Control Circuit Bank 1 Electrical Malfunction

A Camshaft Position Actuator Control Open Circuit Bank 2

TP Sensor Learn Not Complete

Intake Camshaft Control Circuit Bank 1 Short To B+

A Camshaft Position Actuator Control Circuit Signal Low Bank 1

Transmission Range/Pressure Switch Comparison

Intake Camshaft Control Circuit Bank 1 Short To Ground

A Camshaft Position Actuator Control Circuit Signal High Bank 1

Intake Camshaft Control Circuit Bank 1 Open

B Camshaft Position Actuator Control Circuit Signal Low Bank 1

Heated Windshield Request Problem

Intake Camshaft Control Circuit Short To B+

B Camshaft Position Actuator Control Circuit Signal High Bank 1

Ignition Timing Adjustment Switch Circuit

Open or Short to A/C Compressor Clutch Circuit

Ignition Timing Adjustment Switch Circuit Fault

Intake Camshaft Control Circuit Short To Ground

B Camshaft Position Actuator Control Open Circuit Bank 1

A/C Low Side Temperature Sensor Fault

Invalid Test Accelerator Pedal Movement