THE CODE DIRECTORY
Diagnostic code references — Page 59.
Browse canonical reference entries. Each definition keeps its own source and vehicle-applicability limits.
Kia
P1497
EGR Stepper Motor Malfunction Circuit 2 1.8L
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Acura / Honda
P1498
EGR Valve Lift Sensor High Voltage
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Dodge / Jeep +2
P1498
High Speed Rad Fan Ground CTRL Rly Circuit
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Kia
P1498
EGR Stepper Motor Malfunction Circuit 3 1.8L
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Dodge / Jeep +2
P1499
Open Or Shorted Condition Detected In The Hydraulic Cooling Fan Solenoid Control
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Kia
P1499
EGR Stepper Motor Malfunction Circuit 4 1.8L
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BMW
P1500
Idle Speed Control Valve Stuck Open
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Buick / Cadillac +6
P1500
Starter Signal Circuit
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Ford / Lincoln +1
P1500
Vehicle Speed Sensor Intermittent
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Geo
P1500
Starter Signal Circuit Fault
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Kia
P1500
No Vehicle Speed Signal to TCM
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Lexus
P1500
Starter Signal Circuit Malfunction
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Mitsubishi
P1500
Alternator FR Terminal Circuit
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Subaru
P1500
Radiator Fan Relay 1 Circuit Malfunction
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Suzuki
P1500
Engine Starter Signal Circuit Fault
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Volkswagen
P1500
Fuel Pump Relay Electrical Circuit Malfunction
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BMW
P1501
Idle Speed Control Valve Stuck Closed
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Buick / Cadillac +5
P1501
Vehicle Speed Sensor Circuit Intermittent
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Ford / Lincoln +1
P1501
Programmable Speedometer & Odometer Module Vehicle Speed Sensor Intermittent Circuit Failure
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Subaru
P1501
Idle Control System Malfunction Fail Safe
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Volkswagen
P1501
Fuel Pump Relay Circuit Short To Ground
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BMW
P1502
Idle Speed Control Valve Closing Solenoid Control Circuit Signal High Or Low
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Buick / Cadillac +5
P1502
Theft Deterrent System No Password Received
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Ford / Lincoln +1
P1502
Invalid or Missing Vehicle Speed Message or Brake Data
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Subaru
P1502
Radiator Fan Function Problem
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Volkswagen
P1502
Fuel Pump Relay Circuit Short To B+
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BMW
P1503
Idle Speed Control Valve Closing Solenoid Control Circuit Signal Low
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Buick / Cadillac +5
P1503
Theft Deterrent System Password Incorrect
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Volkswagen
P1503
Load Signal From Generator Range Performance
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BMW
P1504
Idle Speed Control Valve Closing Solenoid Control Open Circuit
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Buick / Cadillac +5
P1504
Vehicle Speed Output Circuit
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Ford / Lincoln +1
P1504
Intake Air Control Circuit Malfunction
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Volkswagen
P1504
Intake Air System Bypass Leak Detected
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BMW
P1505
Idle Speed Control Valve Closing Solenoid Control Circuit Electrical
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Ford / Lincoln +1
P1505
Idle Air Control System at Adaptive Clip
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Kia
P1505
Idle Air Control Valve Opening Coil Voltage Low
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Volkswagen
P1505
Closed Throttle Position Does Not Close Open Circuit
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BMW
P1506
Idle Speed Control Valve Open Solenoid Control Circuit Signal High
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Ford / Lincoln +1
P1506
Idle Air Control Over Speed Error
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Kia
P1506
Idle Air Control Valve Opening Coil Voltage High
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Volkswagen
P1506
Closed Throttle Position Switch Does Not Open Short To Ground
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BMW
P1507
Idle Speed Control Valve Open Solenoid Control Circuit Signal Low
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Ford / Lincoln +1
P1507
Idle Air Control Under Speed Error
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Kia
P1507
Idle Air Control Valve Closing Coil Voltage Low
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Subaru
P1507
Idle Control System Malfunction Fail Safe
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Volkswagen
P1507
Idle System Learned Value Lower Limit Attained
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BMW
P1508
Idle Speed Control Valve Opening Solenoid Control Open Circuit
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Buick / Cadillac +5
P1508
IAC System Low RPM
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Acura / Honda
P1508
IAC Valve Circuit Failure
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Kia
P1508
Idle Air Control Valve Closing Coil Voltage High
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Jaguar / Mazda
P1508
Idle Air Control Circuit Open
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Volkswagen
P1508
Idle System Learned Value Upper Limit Attained
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BMW
P1509
Idle Speed Control Valve Opening Solenoid Control Circuit Electrical
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Buick / Cadillac +5
P1509
IAC System High RPM
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Jaguar / Mazda
P1509
Idle Air Control Circuit Shorted
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Volkswagen
P1509
Idle Air Control Circuit Electrical Malfunction
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BMW
P1510
Idle Speed Control Valve Stuck
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Buick / Cadillac +5
P1510
Back UP Power Supply
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Geo
P1510
Backup Power Supply Fault
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Kia
P1510
Idle Air Control Valve Closing Coil High Voltage
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Lexus
P1510
Intake Air Volume Too Low With Supercharger On
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Subaru
P1510
Idle Air Control Solenoid Signal 1 Circuit Low Input
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Suzuki
P1510
PCM Backup Power Supply Circuit Fault
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Toyota
P1510
Boost Pressure Control Circuit
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Volkswagen
P1510
Idle Air Control Circuit Short To B+
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BMW
P1511
DISA Control Circuit Electrical
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Buick / Cadillac +5
P1511
Throttle Control System Backup System Performance
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Subaru
P1511
Idle Air Control Solenoid Signal 1 Circuit High Input
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Toyota
P1511
Boost Pressure Low
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Volkswagen
P1511
Intake Manifold Changeover Valve Circuit Electrical Malfunction
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BMW
P1512
DISA Control Circuit Signal Low
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Ford / Lincoln +1
P1512
Intake Manifold Runner Control Stuck Closed
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Subaru
P1512
Idle Air Control Solenoid Signal 2 Circuit Low Input
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Toyota
P1512
Boost Pressure High
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Volkswagen
P1512
Intake Manifold Changeover Valve Circuit Short To B+
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BMW
P1513
DISA Control Circuit Signal High
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Ford / Lincoln +1
P1513
Intake Manifold Runner Control Stuck Closed
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Kia
P1513
Idle Air Control Valve Closing Coil Low Voltage
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Subaru
P1513
Idle Air Control Solenoid Signal 2 Circuit High Input
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Volkswagen
P1513
Intake Manifold Changeover Valve 2 Circuit Short To B+
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Buick / Cadillac +5
P1514
Throttle Body Performance
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Jaguar / Mazda
P1514
High Load Neutral Drive Fault
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Subaru
P1514
Idle Air Control Solenoid Signal 3 Circuit Low Input
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Volkswagen
P1514
Intake Manifold Changeover Valve 2 Circuit Short To Ground
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Buick / Cadillac +5
P1515
Control Module Throttle Actuator Position Performance
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Kia
P1515
A/T To M/T Codification
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Subaru
P1515
Idle Air Control Solenoid Signal 3 Circuit High Input
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Volkswagen
P1515
Intake Manifold Changeover Valve Circuit Short To Ground
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Buick / Cadillac +5
P1516
Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
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Ford / Lincoln +1
P1516
Intake Manifold Runner Control Input Error
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Jaguar / Mazda
P1516
Gear Change Neutral Drive Fault
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Subaru
P1516
Idle Air Control Solenoid Signal 4 Circuit Low Input
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Volkswagen
P1516
Intake Manifold Changeover Valve Circuit Open
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Buick / Cadillac +5
P1517
Throttle Actuator Control (TAC) Module Performance
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Ford / Lincoln +1
P1517
Intake Manifold Runner Control Input Error
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Jaguar / Mazda
P1517
Cranking Neutral Drive Fault
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Subaru
P1517
Idle Air Control Solenoid Signal 4 Circuit High Input
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Volkswagen
P1517
Main Relay Circuit Electrical Malfunction
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Buick / Cadillac +5
P1518
Throttle Actuator Control (TAC) Module Serial Data Circuit
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Ford / Lincoln +1
P1518
Intake Manifold Runner Control Fault Stuck Open
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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.