DIAGNOSTIC TROUBLE CODE DEFINITIONS

DIAGNOSTIC TROUBLE CODE DEFINITIONS GMC Sierra 1500 HD

DTC	(1) Description	(2) Code Type
BXXXX (3)	Body Control Systems Malfunction	N/A
CXXXX (3)	Chassis Control System Malfunction	N/A
P0016	Camshaft Position Sensor/Crankshaft Position Sensor Correlation Error	C
P0087	Fuel Rail Pressure Low	A
P0088	Fuel Rail Pressure High	A
P0089	Fuel Rail Pressure Sensor Indicating Fuel Pressure Higher Than Desired	(4)
P0090	Fuel Rail Pressure Sensor Current Out Of Range	A
P0101	Mass Air Flow Sensor Performance	(5)
P0102	Mass Air Flow Sensor Circuit - Low Frequency	B
P0103	Mass Air Flow Sensor Circuit - High Frequency	B
P0112	Intake Air Temperature Sensor Circuit - Low Voltage	B
P0113	Intake Air Temperature Sensor Circuit - High Voltage	B
P0116	ECT Sensor Performance	(6) B
P0117	ECT Sensor Circuit - Low Voltage	B
P0118	ECT Sensor Circuit - High Voltage	B
P0128	ECT Less Than Thermostat Regulating Temperature	B
P0168	Fuel Temperature Sensor High	C
P0181	Fuel Temperature Sensor & IAT Sensor Temperature Not Within Specification	B
P0182	Fuel Temperature Sensor Circuit - Low Voltage	A
P0183	Fuel Temperature Sensor Circuit - High Voltage	A
P0192	Fuel Rail Pressure Sensor Circuit - Low Voltage	A
P0193	Fuel Rail Pressure Sensor Circuit - High Voltage	A
P0201-P0208	Fuel Injector Control Circuits	A
P0234	Turbocharger Engine Overboost Condition - California RPO YF5, NE1	B
P0234	Turbocharger Engine Overboost Condition - Federal RPO FE9, NG1	B
P0236	Turbocharger Boost System - California RPO YF5, NE1	B
P0236	Turbocharger Boost System - Federal RPO FE9, NG1	C
P0237	Turbocharger Boost Sensor Circuit Low Voltage - California RPO YF5, NE1	B
P0237	Turbocharger Boost Sensor Circuit Low Voltage- Federal RPO FE9, NG1	B
P0238	Turbocharger Boost Sensor Circuit High Voltage - California RPO YF5, NE1	B
P0238	Turbocharger Boost Sensor Circuit High Voltage - Federal RPO FE9, NG1	B
P0300	Engine Misfire Detected - California RPO YF5, NE1	B
P0300	Engine Misfire Detected - Federal- Federal RPO FE9, NG1	C
P0301-P0308	Cylinders No. 1-8 Misfire Detected - California RPO YF5, NE1	B
P0301-P0308	Cylinders No. 1-8 Misfire Detected - Federal RPO FE9, NG1	C
P0335	Crankshaft Position Sensor Circuit	A
P0336	Crankshaft Position Sensor Circuit Performance	B
P0340	CMP Sensor Circuit Performance	A
P0341	Camshaft Position Sensor Circuit Performance	B
P0370	Timing Reference High Resolution	A
P0374	Timing Reference High Resolution	A
P0380	Glow Plug Circuit Performance - California RPO YF5, NE1	B
P0380	Glow Plug Circuit Performance - Federal RPO FE9, NG1	C
P0381 (3)	Wait-To-Start Indicator Fault Detection Circuit Malfunction	(5)
P0401	EGR System - Insufficient Flow	(6) B
P0404	EGR Valve Open Pintle Position	(6) B
P0405	EGR Pintle Position Circuit - Low Voltage	(6) B
P0406	EGR Sensor Circuit High Voltage	(6) B
P0461	Fuel Level Sensor Circuit Performance	C
P0462	Fuel Level Sensor Circuit - Low Voltage	C
P0463	Fuel Level Sensor Circuit - High Voltage	C
P0489	EGR Solenoid Circuit - Low Voltage	(6) B
P0490	EGR Solenoid Circuit - High Voltage	(6) B
P0500	Vehicle Speed Sensor	(7) B
P0522	Engine Oil Pressure Sensor Circuit Low Voltage	C
P0523	Engine Oil Pressure Sensor Circuit High Voltage	C
P0530	A/C Refrigerant Pressure Sensor Circuit	C
P0540	Intake Air Heater - Incorrect Voltage	B
P0543	Intake Air Heater - Incorrect Voltage	B
P0562	Low System Voltage	C
P0563	High System Voltage	C
P0567 (8)	Cruise Control	C
P0568 (8)	Cruise Control Set/Coast Switch Circuit	C
P0571 (8)	Cruise Control Brake Switch Circuit	C
P0601	ECM Memory	A
P0602	ECM Not Programmed	A
P0603	Control Module Long Term Memory Reset	C
P0604	ECM Random Access Memory Performance	A
P0605	ECM Memory	A
P0606	ECM Memory	A
P0607	ECM Memory	A
P0608 (9)	Vehicle Speed Circuit Fault	C
P0609 (3)	Vehicle Speed Signal Circuit - Low Voltage	C
P0611	Fuel Injection Control Module Internal Fault	B
P0612	Fuel Injection Control Module Internal Fault	B
P0615 (3)	Starter Relay Circuit	C
P0621 (3)	Generator Turn-On Signal Circuit Low/High	C
P0622 (3)	Generator PWM Signal Out Of Range	C
P0641	5-Volt Reference Circuit Out Of Range	A
P0650	MIL Control Circuit	A
P0651	Sensor Reference Voltage "B" Circuit/Open	B
P0654 (9)	Engine Speed Circuit Fault	C
P0700	TCM MIL Request	A
P0704 (10)	Clutch Pedal Switch Input Circuit	B
P0706 (11)	Transmission Range Switch	C
P0802	Transmission Control System MIL Request Circuit Open	B
P0833 (10)	Vehicle Speed Transitions Detected Without Clutch Switch Transitions	C
P1093	Fuel Rail Pressure Out Of Range	(4)
P1094	Excessive Fuel Injection Pump Flow	C
P1125	Accelerator Pedal Position Sensors Out Of Range Or Disagree	C
P1172	Fuel Transfer Malfunction	C
P1223	Incorrect Voltage For Commanded State Of Injector Driver No. 1	(5)
P1226	Incorrect Voltage For Commanded State Of Injector Driver No. 2	(5)
P1229	Incorrect Voltage For Commanded State Of Injector Driver No. 3	(5)
P1232	Incorrect Voltage For Commanded State Of Injector Driver No. 4	(5)
P1235	Incorrect Voltage For Commanded State Of Injector Driver No. 5	(5)
P1238	Commanded State Of Injector Driver No. 6	(5)
P1241	Incorrect Voltage For Commanded State Of Injector Driver No. 7	(5)
P1244	Incorrect Voltage For Commanded State Of Injector Driver No. 8	(5)
P1258	Engine Over-Temperature Condition	A
P1270	Accelerator Pedal Position Sensor A/D Converter Error	C
P1404 (6)	EGR Valve Closed Pintle Position	B
P1550	Fuel Injector Control Module - Low Voltage	C
P1600	ECM Memory	A
P1621	ECM Memory Performance	C
P1626 (3)	Passlock® System Malfunction	C
P1627	ECM Memory	A
P1631 (3)	Passlock® System Malfunction	C
P1637 (3)	Generator "L" Terminal Circuit - Improper Voltage Level	C
P1638 (3)	Generator Field Duty Cycle Signal Circuit Out Of Range	C
P1658	Fuel Injector Control Module Driver Circuits	A
P1680	ECM Memory	A
P1681	ECM Memory	A
P1683	ECM Memory	A
P2066 (9)	Secondary Fuel Level Sensor Signal Lack Of Variation	C
P2067 (9)	Secondary Fuel Level Sensor Signal Lower Than Normal	C
P2068 (9)	Secondary Fuel Level Sensor Signal Higher Than Normal	C
P2122	Accelerator Pedal Position Sensor No. 1 Low Voltage	C
P2123	Accelerator Pedal Position Sensor No. 1 High Voltage	C
P2127	Accelerator Pedal Position Sensor No. 2 Low Voltage	C
P2128	Accelerator Pedal Position Sensor No. 2 High Voltage	C
P2132	Accelerator Pedal Position Sensor No. 3 Low Voltage	C
P2133	Accelerator Pedal Position Sensor No. 3 High Voltage	C
P2138	Accelerator Pedal Position Sensors No. 1 & 2 Correlation Error	C
P2139	Accelerator Pedal Position Sensors No. 2 & 3 Correlation Error	C
P2140	Accelerator Pedal Position Sensors No. 1 & 3 Correlation Error	C
P2141	EGR Throttle Valve Vacuum Control Solenoid Circuit - Low Voltage	(6) B
P2142	EGR Throttle Valve Vacuum Control Solenoid Circuit - High Voltage	(6) B
P2144	EGR Throttle Valve Vacuum Control Solenoid Circuit - High Voltage	(6) B
P2145	EGR Vacuum Vent Solenoid Control Circuit - High Voltage	(6) B
P2146	Fuel Injector Circuit Condition - Cylinder No. 1, 4, 6, Or 7	A
P2149	Fuel Injector Circuit Condition - Cylinder No. 2, 3, 5, Or 8	A
P2227	Barometric Pressure Sensor/EGR Vacuum Sensor Correlation Error - California RPO YF5, NE1	B
P2227	Barometric Pressure Sensor/Boost Sensor Correlation Error - Federal RPO FE9, NG1	C
P2228	Barometric Pressure Sensor Signal Low - California RPO YF5, NE1	B
P2228	Barometric Pressure Sensor Signal Low - Federal RPO FE9, NG1	B
P2229	Barometric Pressure Sensor Signal High - California RPO YF5, NE1	B
P2229	Barometric Pressure Sensor Signal High - Federal RPO FE9, NG1	B
P2279 (6)	Air Intake Leak Detected	B
P2610	ECM Memory	B
UXXXX (3)	Network Communication System Malfunction	N/A
(1) DTC definitions may vary depending on vehicle and/or engine configuration. (2) See CODE TYPES under ON-BOARD DIAGNOSTICS. (3) See appropriate BODY CONTROL SYSTEM article in ACCESSORIES & EQUIPMENT. (4) On California emissions equipped vehicles (RPO codes YF5, NE1), this DTC is a type "A" code. On Federal emissions equipped vehicles (RPO codes FE9, NG1), this DTC is a type "C" code. (5) On California emissions equipped vehicles (RPO codes YF5, NE1), this DTC is a type "B" code. On Federal emissions equipped vehicles (RPO codes FE9, NG1), this DTC is a type "C" code. (6) Code does not apply to Federal vehicles (7) On vehicles equipped with A/T, see appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS. On vehicles equipped with M/T, see appropriate DIAGNOSIS article in MANUAL TRANSMISSIONS. (8) See appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT. (9) See appropriate ANALOG INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. (10) See appropriate DIAGNOSIS article in MANUAL TRANSMISSIONS. (11) See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.

(1)	DTC definitions may vary depending on vehicle and/or engine configuration.

(2)	See CODE TYPES under ON-BOARD DIAGNOSTICS.

(3)	See appropriate BODY CONTROL SYSTEM article in ACCESSORIES & EQUIPMENT.

(4)	On California emissions equipped vehicles (RPO codes YF5, NE1), this DTC is a type "A" code. On Federal emissions equipped vehicles (RPO codes FE9, NG1), this DTC is a type "C" code.

(5)	On California emissions equipped vehicles (RPO codes YF5, NE1), this DTC is a type "B" code. On Federal emissions equipped vehicles (RPO codes FE9, NG1), this DTC is a type "C" code.

(6)	Code does not apply to Federal vehicles

(7)	On vehicles equipped with A/T, see appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS. On vehicles equipped with M/T, see appropriate DIAGNOSIS article in MANUAL TRANSMISSIONS.