MANUFACTURER REFERENCE

Cadillac code references.

Read the source definition and confirm the exact vehicle, reporting module and diagnostic procedure.

Buick / Cadillac +6

P1031

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.

HO2S Heater Current Monitor Control Circuit Sensors 1

HO2S Heater Warm Up Control Circuit Sensors 1

Secondary Vacuum Sensor Circuit

MAP Sensor Circuit Intermittent High Voltage

MAP Sensor Circuit Intermittent Low Voltage

BARO To MAP Sensor Circuit Comparison Too High

Secondary Port Throttle System

Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage

Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage

Intake Resonance Switchover Valve Circuit

Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage

Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage

ECT Signal Unstable Or Intermittent

Engine Coolant Temp Signal Out-Of-Range Low

Engine Coolant Temp Signal Out-Of Range High

ECT Signal Out Of Rage With TFT Sensor

Throttle Position (TP) Sensor 1 Circuit

TP Sensor Circuit Intermittent High Voltage

TP Sensor Circuit Intermittent Low Voltage

Accelerator Pedal Position (APP) System

HO2S Circuit Low Variance Bank 1 Sensor 1

HO2S Circuit Low Variance Bank 1 Sensor 2

H02S Circuit Low Variance Bank 2 Sensor 1

HO2S Insufficient Switching

HO2S Transition Time Ratio

HO2S Lean Average Bank 1 Sensor 1

HO2S Rich Average Bank 1 Sensor 1

HO2S Bank 1 Sensor 2 Lean Or Low Voltage

HO2S Bank 1 Sensor 2 Rich Or High Voltage

HO2S Insufficient Switching Bank 1 Sensor 2

HO2S Transition Time Ratio Bank 1 Sensor 2

HO2S Bank 1 Sensor 2 Average Voltage Level

HO2S Bank 1 Sensor 3 Lean Or Low Voltage

HO2S Bank 1 Sensor 3 Rich Or High Voltage

HO2S Cross Counts Bank 1 Sensor 3

HO2S Insufficient Switching

HO2S Transition Time Ratio

HO2S Lean Average Bank 2 Sensor 1

HO2S Rich Average Bank 2 Sensor 1

HO2S Bank 2 Sensor 2 Lean System Or Low Voltage

HO2S Bank 2 Sensor 2 Rich Or High Voltage

HO2S Cross Counts Bank 2 Sensor 2

HO2S Heater Power Stage Circuit Bank 2 Sensor 2

HO2S Bank 2 Sensor 3 Lean System Or Low Voltage

HO2S Bank 2 Sensor 3 Rich Or High Voltage

HO2S Cross Counts Bank 2 Sensor 2

Bank To Bank Fuel Trim Offset

Fuel System Lean During Acceleration

Engine Oil Temperature Circuit

EOT Circuit Performance

EOT Sensor Circuit Low Voltage

EOT Sensor Circuit High Voltage

Engine Oil Pressure Switch Circuit

Engine Vacuum Leak

Intake Air Duct Air Leak

Injector Control Circuit

(Alternative Fuel) Gas Mass Sensor Circuit Range/Performance

(Alternative Fuel) Gas Mass Sensor Circuit Low Frequency

(Alternative Fuel) Gas Mass Sensor Circuit High Frequency

Mass Air Flow Circuit Intermittent High

Mass Air Flow Circuit Intermittent Low

Injection Pump Timing Offset

Ground Fault Detection Indicated

Fuel Solenoid Response Time Too Short

Fuel Solenoid Response Time Too Long

Injection Pump Calibration Circuit

Throttle Position Sensor Reference Voltage

Throttle Position (TP) Sensor 2 Circuit

Throttle Position (TP) Sensor 1-2 Correlation

Injector Control Circuit Intermittent

Injector Circuit Cylinder 2 Intermittent

Injector Circuit Cylinder 3 Intermittent

Injector Circuit Cylinder 4 Intermittent

Injector Circuit Cylinder 5 Intermittent

Injector Circuit Cylinder 6 Intermittent

Injector Circuit Cylinder 7 Intermittent

Injector Circuit Cylinder 8 Intermittent

Intake Plenum Switchover Valve

Early Fuel Evaporation Heater Circuit

Supercharger System Overboost