Diagnostic System Check

WARNING: This page is about a different car, the 2001 Pontiac Grand Prix, 2001 Pontiac Firebird, 2001 Oldsmobile Intrigue, and 2001 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

Install scan tool. If scan tool powers up, go to next step. If scan tool does not power up, see SCAN TOOL DOES NOT POWER UP under appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
Turn ignition on, engine off. Try to establish scan tool communication with Electronic Brake Control Module (EBCM) and Powertrain Control Module (PCM). If communication with modules is established, go to next step. If communication with modules is not established, see SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
Select display DTC function for each module. Record all displayed DTCs, status of displayed DTCs and module that set DTC. If DTCs are displayed, go to next step. If no DTCs are displayed, see SYMPTOM DIAGNOSIS .
Retrieve codes and perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS table.

DIAGNOSTIC TROUBLE CODE DEFINITIONS

Code

Definition

BXXXX

⁽¹⁾

C0035

Left Front Wheel Speed Circuit Malfunction

C0036

Left Front Wheel Speed Circuit Range/Performance

C0040

Right Front Wheel Speed Circuit Malfunction

C0041

Right Front Wheel Speed Circuit Range/Performance

C0045

Left Rear Wheel Speed Circuit Malfunction

C0046

Left Rear Wheel Speed Circuit Range/Performance

C0050

Right Rear Wheel Speed Circuit Malfunction

C0051

Right Rear Wheel Speed Circuit Range/Performance

C0060

Left Front ABS Solenoid No. 1 Circuit Malfunction

C0065

Left Front ABS Solenoid No. 2 Circuit Malfunction

C0070

Right Front ABS Solenoid No. 1 Circuit Malfunction

C0075

Right Front ABS Solenoid No. 2 Circuit Malfunction

C0080

Left Rear ABS Solenoid No. 1 Circuit Malfunction

C0085

Left Rear ABS Solenoid No. 2 Circuit Malfunction

C0090

Right Rear ABS Solenoid No. 1 Circuit Malfunction

C0095

Right Rear ABS Solenoid No. 2 Circuit Malfunction

C0100 ⁽²⁾

Rear ABS Solenoid No. 1 Circuit Malfunction

C0105 ⁽²⁾

Rear ABS Solenoid No. 2 Circuit Malfunction

C0110

Pump Motor Circuit Malfunction

C0121

Valve Relay Circuit Malfunction

C0131 ⁽³⁾

ABS/TCS System Pressure Circuit Malfunction

C0132 ⁽³⁾

ABS/TCS System Pressure Circuit Range/Performance

C0141 ⁽⁴⁾

Left TCS Solenoid No. 1 Circuit Malfunction

C0146 ⁽⁴⁾

Left TCS Solenoid No. 2 Circuit Malfunction

C0151 ⁽⁴⁾

Right TCS Solenoid No. 1 Circuit Malfunction

C0156 ⁽⁴⁾

Right TCS Solenoid No. 2 Circuit Malfunction

C0161

ABS/TCS Brake Switch Circuit Malfunction

C0166 ⁽²⁾

TCS Priming Line Valve Circuit Malfunction

C0171 ⁽²⁾

TCS Pilot Valve Circuit Malfunction

C0181 ⁽²⁾

Throttle Reduction Motor Circuit Malfunction

C0182 ⁽²⁾

Throttle Reduction Motor Circuit Range/Performance

C0186 ⁽³⁾

Lateral Accelerometer Circuit Malfunction

C0187 ⁽³⁾

Lateral Accelerometer Circuit Range/Performance

C0196 ⁽³⁾

Yaw Rate Circuit Malfunction

C0197 ⁽³⁾

Yaw Rate Circuit Range/Performance

C0235

TCS RPM Signal Circuit Malfunction

C0236

TCS RPM Signal Circuit Malfunction

C0237

TCS RPM Signal Circuit Malfunction

C0238 ⁽²⁾

TCS Throttle Position Sensor Comparison Malfunction

C0239 ⁽²⁾

TCS Spark Retard Monitoring Malfunction

C0240

PCM Traction Control Not Allowed

C0241

PCM Indicated Requested Torque Malfunction

C0244

PWM Delivered Torque Malfunction

C0245

Wheel Speed Sensor Frequency Error

C0252 ⁽³⁾

Active Brake Control Sensors Uncorrelated

C0253 ⁽³⁾

Centering Fault

C0266 ⁽²⁾

ADS Controller Malfunction

C0550

ECU Malfunction

C0710 ⁽³⁾

Steering Position Signal Malfunction

C0870 ⁽³⁾

BPMV Pressure Sensor Reference Circuit Malfunction

C0875 ⁽³⁾

Yaw/Lateral Accelerometer Sensor Circuit Malfunction

C0896

Device Voltage Range/Performance

C0901 ⁽²⁾

Device No. 2 Voltage Low

P1504

TCS RPM Signal Circuit Malfunction

P1571

PCM Indicated Requested Torque Malfunction

P1689

PWM Delivered Torque Malfunction

PXXXX

⁽⁵⁾

U1650 ⁽³⁾

Chassis System Dedicated Bus Controller Malfunction

U1651 ⁽³⁾

Chassis System Dedicated Bus Sensor Malfunction

UXXXX

⁽⁶⁾

⁽¹⁾	See DIAGNOSTIC TESTS under appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.

⁽²⁾	Camaro and Firebird only.

⁽³⁾	Intrigue only.

⁽⁴⁾	Grand Prix and Intrigue only.

⁽⁵⁾	For any DTC beginning with the letter "P", except P1504, P1571 or P1689, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

⁽⁶⁾	For any DTC beginning with the letter "U" except U1650 and U1651, see SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.