C4 diagnostic tool

[mickdowd]

Code 44. Thank you for your time.

 

[teamzr1]

Those with a GM OBD-1 vehicle should save these for future needs

In your case, a DTC of 44 means the left side of the engine is running too lean
I would know more if you had a OBD-I scanner like the one I pointed to in a post above

In the blind,
Could be the left O2 sensor
Some type of air or exhaust leak on the left side
If the engine has fuel injectors, then a dirty or weak fuel injector

C4 ECM Error Codes By JR - Team ZR-1 Corvette Racers LLC
DTC	Circuit or Sensor
11	Malfunction Indicator Lamp Circuit - VIN P Only
13	Oxygen Sensor Circuit
14	Coolant Sensor Circuit (High)
15	Coolant Sensor Circuit (Low)
16	Ignition Problems (Used on 1992–1996 models only)
18	Injector Circuits - VIN P
21	Throttle Position Sensor (TPS) (High)
22	Throttle Position Sensor (TPS) (Low)
23	Intake Air Temperature (Low)
24	Vehicle Speed Sensor (VSS)
25	Intake Air Temperature (High)
26	Quad Driver Module Number 1 - VIN P
27	Quad Driver Module Number 2 - VIN P
28	Quad Driver Module Number 3 - VIN P
29	Secondary Air Injection Pump Circuit - VIN P
31	Camshaft Position Sensor - VIN J Only
32	Exhaust Gas Recirculation Circuit
33	Mass Air Flow Sensor Circuit (1985-1990)
33	Manifold Absolute Pressure High (1984 and LT-5)
34	Mass Air Flow Circuit (1985-1990)
34	Manifold Absolute Pressure Low (1984 and LT-5)
35	Idle Air Control Circuit (IAC) - VIN P
35	Manifold Absolute Pressure (MAP) - VIN J
36	Mass Air Flow Burn Off Circuit - VIN P
36	Electronic Ignition System Missing or Extra IC Signal - VIN J
37	Brake Switch Stuck On - VIN P
38	Brake Switch Stuck Off - VIN P
41	Cylinder Select Error Circuit (1985-1991 and LT-5) bad E-Prom
41	Ignition Control (IC) Circuit Open (1994-96)
42	Electronic Spark Timing Circuit (EST) IC Shorted - VIN P
42	Ignition Control (IC) Timing Circuit - VIN J
43	Knock Sensor Circuit
44	Bank 1 (Left Front) O2 Lean Exhaust Indicated
45	Bank 1 O2 Rich Exhaust Indicated
46	VATS Anti Theft Circuit Fault - VIN P
47	Knock Sensor Circuit or Module Missing - VIN P
48	Mass AirFlow (MAF) Sensor - VIN P
50	System Charging Voltage Low - VIN P
51	PROM/EEPROM Error
52	Oil Temperature Circuit (Low Temperature)
53	System Charging Voltage High
54	Fuel Pump Circuit (Low Voltage)
55	Engine Fuel Running Lean
56	Secondary Air Inlet Valve Actuator Vacuum - VIN J
58	Trannie Fluid Temp Circuit low
59	Trannie Fluid Temp Circuit High
61	Secondary Air Inlet Valve Actuator Valve - VIN J
62	Engine Oil Temperature Circuit (High Temperature)
63	Bank 2 Oxygen Sensor Circuit (Open)
64	Bank 2 Oxygen Sensor Circuit (Lean Exhaust)
65	Oxygen Sensor Circuit (Rich Exhaust)
66	Air Conditioner Pressure Open or Shorted
66	Valet Power Switch - VIN J
67	Air Conditioner Pressure Limit Exceeded
68	Air Conditioner Relay Fault
69	Air Conditioner Clutch Fault
70	A/C Clutch Relay Driver
72	Speed Sensor Loss or Gear Selector Switch Fault (Start Lockout)
73	Pressure Control Solenoid - PCM only Circuit
74	Traction Control System - Low
75	Trannie System Voltage Low
77	Primary Cooling Fan Relay Control
78	Secondary Cooling Fan Relay Control
79	Trannie Fluid Over Temp
80	Trannie Component Slipping
81	Trannie 2-3 Shift Solenoid
82	Trannie 1-2 Shift Solenoid
84	3-2 Control Solenoid - Auto Trannie
84	2-3 Gear Block out Relay - Manual Trannie
85	Trannie TCC Stuck On
90	Trannie TCC Solenoid
91	1 to 4 Up shift Lamp - Manual
97	VSS Output Circuit (Speedo)