Buick Regal Owners & Service Manuals

Buick Regal: DTC P1434

Diagnostic Instructions

  • Perform the Diagnostic System Check prior to using this diagnostic procedure:Diagnostic System Check - Vehicle
  • Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
  • An overview of each diagnostic category can be found here:Diagnostic Procedure Instructions

DTC Descriptor

Fuel Level Sensor 1 Reference Feedback Performance

Circuit/System Description

The signal circuit is connected to the following control module: K111 Fuel Pump Driver Control Module The control module communicates with the engine control module via serial data.

Conditions for Running the DTC

Ignition - On / Vehicle - In Service Mode

Ignition Voltage = Greater than 11 V

Conditions for Setting the DTC

Invalid Data Received From Fuel Pump Control Module

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category = Type B DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category = Type B DTC

Reference Information

Schematic Reference

Data Communication Wiring Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEW INDEX

Electrical Information Reference

  • Circuit Testing
  • Connector Repairs
  • Testing for Intermittent Conditions and Poor Connections
  • Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode.

2. Verify no other DTCs are set.

  • If other DTCs are set

Refer to:Diagnostic Trouble Code (DTC) List - Vehicle

  • Go to next step: If no other DTCs are set

3. Replace the component: K111 Fuel Pump Driver Control Module.

4. Verify the DTC does not set.

  • If the DTC is set

Replace the component: K20 Engine Control Module

  • Go to next step: If the DTC is not set

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification.

For control module replacement, programming, and setup refer to: Control Module References.

DTC P143E

Diagnostic Instructions

  • Perform the Diagnostic System Check prior to using this diagnostic procedure:Diagnostic System Check - Vehicle
  • Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
  • An overview of each diagnostic category can be found here:Diagnostic Procedure Instructions

DTC Descriptor

Fuel Level Sensor 2 Reference Feedback Performance

Circuit/System Description

The signal circuit is connected to the following control module: K111 Fuel Pump Driver Control Module.

The control module communicates with the engine control module via serial data.

Conditions for Running the DTC

Ignition - On / Vehicle - In Service Mode

Ignition Voltage = Greater than 11 V

Conditions for Setting the DTC

Invalid Data Received From Fuel Pump Control Module

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category = Type B DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category = Type B DTC

Reference Information

Schematic Reference

Data Communication Wiring Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEW INDEX

Electrical Information Reference

  • Circuit Testing
  • Connector Repairs
  • Testing for Intermittent Conditions and Poor Connections
  • Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode.

2. Verify no other DTCs are set.

  • If other DTCs are set

Refer to:Diagnostic Trouble Code (DTC) List - Vehicle

  • Go to next step: If no other DTCs are set

3. Replace the component: K111 Fuel Pump Driver Control Module.

4. Verify the DTC does not set.

  • If the DTC is set

Replace the component: K20 Engine Control Module.

  • Go to next step: If the DTC is not set

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification.

For control module replacement, programming, and setup refer to: Control Module References.

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