MANUFACTURER REFERENCE
GMC code references — Page 2.
Read the source definition and confirm the exact vehicle, reporting module and diagnostic procedure.
Buick / Cadillac +6
P1305
Ignition Coil 2 Primary Feedback Circuit
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Buick / Cadillac +6
P1310
Ignition Coil 3 Primary Feedback Circuit
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Buick / Cadillac +6
P1315
Ignition Coil 4 Primary Feedback Circuit
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Buick / Cadillac +5
P1320
IC Module 4X Ref Circuit Intermittent No Pulses
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Buick / Cadillac +5
P1321
Electronic Ignition System Fault Line
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Buick / Cadillac +5
P1322
EI System Or Ignition Control Missing
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Buick / Cadillac +5
P1323
24X Reference Circuit Low Frequency
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Buick / Cadillac +5
P1324
Crank RPM Too Low
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Buick / Cadillac +5
P1335
CKP Circuit
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Buick / Cadillac +5
P1336
Crankshaft Position (CKP) System Variation Not Learned
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Buick / Cadillac +5
P1345
CKP/CMP Correlation
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Buick / Cadillac +5
P1346
Intake Camshaft Position (CMP) Sensor System Performance
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Cadillac / Chevrolet +3
P1350
Ignition Control System
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Buick / Cadillac +5
P1351
IC Circuit High Voltage
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Buick / Cadillac +5
P1352
IC Output High/Pulse Detected When Grounded Cyl.2
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Buick / Cadillac +5
P1353
IC Output High/Pulse Detected When Grounded Cyl.3
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Buick / Cadillac +5
P1354
IC Output High/Pulse Detected When Grounded Cyl.4
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Buick / Cadillac +5
P1355
IC Output High/Pulse Detected When Grounded Cyl.5
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Buick / Cadillac +5
P1356
IC Output High/Pulse Detected When Grounded Cyl.6
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Buick / Cadillac +5
P1357
IC Output High/Pulse Detected When Grounded Cyl.7
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Buick / Cadillac +5
P1358
IC Output High/Pulse Detected When Grounded Cyl.8
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Buick / Cadillac +5
P1359
Ignition Control Circuit Group A
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Buick / Cadillac +5
P1360
Ignition Control Circuit Group B
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Buick / Cadillac +5
P1361
IC Circuit Low Voltage
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Buick / Cadillac +5
P1362
IC Cylinder 2 Not Toggling After Enable
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Buick / Cadillac +5
P1363
IC Cylinder 3 Not Toggling After Enable
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Buick / Cadillac +5
P1364
IC Cylinder 4 Not Toggling After Enable
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Buick / Cadillac +5
P1365
IC Cylinder 5 Not Toggling After Enable
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Buick / Cadillac +5
P1366
IC Cylinder 6 Not Toggling After Enable
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Buick / Cadillac +5
P1367
IC Cylinder 7 Not Toggling After Enable
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Buick / Cadillac +5
P1368
IC Cylinder 8 Not Toggling After Enable
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Buick / Cadillac +5
P1370
IC Module 4X Reference Circuit Too Many Pulses
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Buick / Cadillac +5
P1371
DI Low Resolution Circuit
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Buick / Cadillac +5
P1372
Crankshaft Position Sensor Circuit Performance
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Buick / Cadillac +5
P1374
3X Reference Circuit
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Buick / Cadillac +5
P1375
24X Reference Circuit High Voltage
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Buick / Cadillac +5
P1376
Ignition Ground Circuit
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Buick / Cadillac +5
P1377
IC Module CAM Pulse To 4X Reference Pulse Comparison
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Buick / Cadillac +5
P1380
Misfire Detected Rough Road Data Not Available
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Buick / Cadillac +5
P1381
Misfire Detected No Communication with Brake Control Module
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Buick / Cadillac +5
P1390
Wheel Speed Sensor 1, G-Sensor Circuit
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Buick / Cadillac +5
P1391
Wheel Speed Sensor 1, G-Sensor Circuit Performance
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Buick / Cadillac +5
P1392
Wheel Speed Sensor 1, G-Sensor Circuit Low Voltage
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Buick / Cadillac +5
P1393
Wheel Speed Sensor 1, G-Sensor Circuit High Voltage
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Buick / Cadillac +5
P1394
Wheel Speed Sensor 1, G-Sensor Circuit Intermittent
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Buick / Cadillac +5
P1395
Wheel Speed Sensor 2, G-Sensor Circuit
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Buick / Cadillac +5
P1396
Wheel Speed Sensor 2, G-Sensor Circuit Performance
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Buick / Cadillac +5
P1397
Wheel Speed Sensor 2, G-Sensor Circuit Low Voltage
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Buick / Cadillac +5
P1398
Wheel Speed Sensor 2, G-Sensor Circuit High Voltage
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Buick / Cadillac +5
P1399
Wheel Speed Sensor 2, G-Sensor Circuit Intermittent
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Buick / Cadillac +5
P1403
Exhaust Gas Recirculation System Valve 1
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Buick / Cadillac +7
P1404
Exhaust Gas Recirculation System Valve 2
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Buick / Cadillac +7
P1405
Exhaust Gas Recirculation System Valve 3
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Buick / Cadillac +7
P1406
EGR Valve Pintle Position Circuit
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Buick / Cadillac +7
P1407
EGR Air Intrusion In Exhaust Supply To EGR Valve
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Buick / Cadillac +7
P1408
Intake Manifold Pressure Sensor Circuit
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Buick / Cadillac +7
P1409
EGR Vacuum System Leak
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Buick / Cadillac +7
P1410
Fuel Tank Pressure System
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Buick / Cadillac +7
P1415
Secondary Air Injection (AIR) System
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Buick / Cadillac +7
P1416
AIR System Bank 1
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Buick / Cadillac +7
P1418
Secondary Air Injection System Relay A Control Circuit High
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Buick / Cadillac +7
P1420
Intake Air Low Pressure Switch Circuit Low Voltage
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Buick / Cadillac +7
P1421
Intake Air Low Pressure Switch Circuit High Voltage
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Buick / Cadillac +7
P1423
Intake Air High Pressure Switch Circuit High Voltage
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Buick / Cadillac +7
P1431
Fuel Level Sensor 2 Performance
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Buick / Cadillac +7
P1432
Fuel Level Sensor 2 Circuit Low Voltage
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Buick / Cadillac +7
P1433
Fuel Level Sensor 2 Circuit High Voltage
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Buick / Cadillac +7
P1441
Evaporative Emission (EVAP) System Flow During Non-Purge
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Buick / Cadillac +7
P1442
EVAP Vacuum Switch High Voltage During Ignition On
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Buick / Cadillac +7
P1450
Barometric Pressure Sensor Circuit
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Buick / Cadillac +9
P1451
Barometric Pressure Sensor Performance
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Buick / Cadillac +7
P1460
Cooling Fan Control System
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Buick / Cadillac +5
P1480
Cooling Fan 1 Control Circuit High
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Buick / Chevrolet +3
P1483
Engine Coolilng System Performance
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Buick / Cadillac +6
P1500
Starter Signal Circuit
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Buick / Cadillac +5
P1501
Vehicle Speed Sensor Circuit Intermittent
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Buick / Cadillac +5
P1502
Theft Deterrent System No Password Received
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Buick / Cadillac +5
P1503
Theft Deterrent System Password Incorrect
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Buick / Cadillac +5
P1504
Vehicle Speed Output Circuit
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Buick / Cadillac +5
P1508
IAC System Low RPM
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Buick / Cadillac +5
P1509
IAC System High RPM
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Buick / Cadillac +5
P1510
Back UP Power Supply
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Buick / Cadillac +5
P1511
Throttle Control System Backup System Performance
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Buick / Cadillac +5
P1514
Throttle Body Performance
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Buick / Cadillac +5
P1515
Control Module Throttle Actuator Position Performance
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Buick / Cadillac +5
P1516
Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
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Buick / Cadillac +5
P1517
Throttle Actuator Control (TAC) Module Performance
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Buick / Cadillac +5
P1518
Throttle Actuator Control (TAC) Module Serial Data Circuit
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Buick / Cadillac +5
P1519
Electronic Throttle Module Low Volts Communication Disable
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Buick / Cadillac +5
P1520
Gear Indicator System
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Buick / Cadillac +5
P1521
Transmission Engaged At High Throttle Angle
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Buick / Cadillac +5
P1522
Park/Neutral To Drive/Reverse At High RPM
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Buick / Cadillac +5
P1523
Electronic Throttle Control Throttle Return
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Buick / Cadillac +5
P1524
TP Sensor Learned CI Throttle Angle Out Of Range
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Buick / Cadillac +5
P1525
Throttle Body Service Required
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Buick / Cadillac +5
P1526
TP Sensor Learn Not Complete
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Buick / Cadillac +5
P1527
Transmission Range/Pressure Switch Comparison
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Buick / Cadillac +5
P1529
Heated Windshield Request Problem
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Buick / Cadillac +6
P1530
Ignition Timing Adjustment Switch Circuit
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Buick / GMC +1
P1531
A/C Low Side Temerature Sensor Fault
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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.