2000 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE

Diagnostic Trouble Code Definitions

WARNING: This page is about a different car, the 2002 Pontiac Firebird and 2002 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC Description Perform Test
12 Diagnostic System Check DTC 12 
21/31 Courtesy Lights Feed Circuit Open Or Short To Ground DTC 21/31 
22/32 Courtesy Lights Return Circuit Short To Voltage DTC 22/32 
23/33 Retained Accessory Power Circuit Short To Ground Or Voltage DTC 23/33 
24/34 Seat Belt Indicator Circuit Short To Ground Or Voltage DTC 24/34 
25/35 Security Indicator Status DTC 25/ 35 
41 Body Control Module Received Valid Message From Remote Transmitter DTC 41 
42 Remote Transmitter Not Assigned To Body Control Module DTC 42 
43 Body Control Module With Sumcheck Error DTC 43 
44 Body Control Module With Encryption Error DTC 44 
45 Processing In 20-Second Lock-Out DTC 45 
55 Begin Configuration Display DTC 55 
B0016 Instrument Panel Module Deployment Loop Low Resistance (1)
B0017 Instrument Panel Module Deployment Loop High Resistance (1)
B0018 Instrument Panel Module High Control Input Malfunction (1)
B0022 Steering Wheel Module Deployment Loop Low Resistance (1)
B0024 Steering Wheel Module High Control Input Malfunction (1)
B0026 Steering Wheel Module Deployment Loop High Resistance (1)
B0051 Sufficient Force Frontal Collision Detected (1)
B0053 Deployment Loop Malfunction Exists (1)
B0670 AIR BAG Indicator Failure (1)
B1000 Body Control Module Internal Fault DTC B1000 
B1001 Sensing Diagnostic Module ID Mismatch (1)
C0035, C0040, C0045, C0050 Wheel Speed Sensor Signal Short To Voltage (2)
C0036, C0041, C0046, C0051 Wheel Speed Malfunction (2)
C0060-C0095 Solenoid Coil Or Solenoid Circuit Open (2)
C0100 Or C0105 Solenoid Coil Or Solenoid Circuit Short To Ground Or Voltage (2)
C0110 Pump Motor Voltage Malfunction (2)
C0121 Electronic Brake Control Module Voltage Malfunction (2)
C0161 Electronic Brake Control Module Detects Battery Voltage At All Times (2)
C0166 Or C0171 Electronic Brake Control Module Senses Open Circuit (2)
C0181 Electronic Brake Control Module Detects Open Circuit (2)
C0182 Accelerator And Servo Control Module Malfunction (2)
C0235-C0237 Or P1504 Electronic Brake Control Module Senses No RPM Input Signal (2)
C0238 Electronic Brake Control Module Detects Throttle Position Malfunction (2)
C0239 Electronic Brake Control Module Senses A Short To Ground (2)
C0240 Traction Control System Shut Down (2)
C0241 Or P1571 Pulse Width Modulated Signal Malfunction (2)
C0244 Or P1689 Pulse Width Modulated Signal Is Out Of Range (2)
C0245 Electronic Brake Control Module Wheel Speed Sensor Malfunction (2)
C0266 Electronic Brake Control Module Senses No Throttle Position Input (2)
C0550 Internal Malfunction In Electronic Brake Control Module (2)
C0896 Electronic Brake Control Module Voltage Malfunction (2)
C0901 Ignition Switch Voltage Malfunction (2)
P0461 Fuel Level Sensor Malfunction (3)
P0462 Fuel Level Sensor Voltage High (3)
P0463 Fuel Level Sensor Voltage Low (3)
P0502 Vehicle Speed Sensor Circuit Low Input (4)
P0503 Vehicle Speed Sensor Circuit Intermittent Malfunction (4)
P0560 System Voltage Out Of Range (5)
P0562 System Voltage Low (5)
P0563 System Voltage High (5)
P0567 Resume/Accelerate Switch Signal Malfunction (6)
P0568 Set/Coast Switch Signal Malfunction (6)
P0571 Cruise Control Clutch Switch Circuit Failure (6)
P0608 Vehicle Speed Sensor Output Circuit Malfunction (3)
P0615 Starter Relay Circuit Malfunction (7)
P0620 Generator Signal Circuit Voltage Low (5)
P0704 Cruise Control Clutch Switch Malfunction (6)
P1554 Cruise Control Signal Status Failure To Powertrain Control Module (6)
P1574 Sudden Decrease In Vehicle Speed On Non-Drive Wheel (6)
P1585 Cruise Inhibit Signal Circuit Malfunction (6)
P1586 Decrease In Vehicle Speed Without A Switch Signal (6)
P1626 Theft Deterrent System Fuel Enable Signal Lost (8)
P1629 Theft Deterrent System Fuel Enable Signal Lost (8)
P1637 Generator Light Driver Circuit Malfunction (5)
PXXX Powertrain Control Module Fault (9)
U1000 & U1255 Class 2 Communication Malfunction DTC U1000 & U1255 
U1001-U1254 Loss Of XXX Communications DTC U1001-U1254 
U1300, U1301 or U1305 Class 2 Serial Data Circuit Low DTC U1300, U1301, or U1305 
(1) For information on air bag DIAGNOSIS & TESTING, see lemon-25(R) AIR BAG SERVICE & REPAIR MANUAL, DOMESTIC & IMPORTED MODELS.
(2) See appropriate ANTI-LOCK article in BRAKES.
(3) See ANALOG INSTRUMENT PANELS - CAMARO & FIREBIRD article.
(4) See appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSION.
(5) See GENERATORS & REGULATORS - CAMARO & FIREBIRD article in STARTING & CHARGING SYSTEMS.
(6) See CRUISE CONTROL SYSTEMS - CAMARO & FIREBIRD article.
(7) See appropriate STARTERS article in STARTING & CHARGING SYSTEMS.
(8) See ANTI-THEFT SYSTEMS - CAMARO & FIREBIRD article.
(9) For powertrain control module diagnostic trouble code descriptions and testing procedures, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
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