Buick Regal: DTC P1100
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 Signal Message Counter Incorrect
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
Conditions for Setting the DTC
K20 Engine Control Module = K111 Fuel Pump Driver Control Module - Message Counter Incorrect
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
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 P1200
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 Signal Message Counter Incorrect
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
Conditions for Setting the DTC
K20 Engine Control Module = K111 Fuel Pump Driver Control Module - Message Counter Incorrect
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
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.
READ NEXT:
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
DTC P250A
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Symptoms - Displays and Gauges
NOTE: The following steps must be completed before using the symptom
diagnostic tables.
1. Before using the symptom diagnostic tables, perform the Diagnostic System
Check - Vehicle in
order to determ
SEE MORE:
Transmission Fluid Cooler Flow Test and Flushing (AF50-8)
Special Tools
DT - 45096 TransFlow Cooler Flush Machine
DT - 45096 - 30 TransFlow Adapter
For equivalent regional tools, refer to Special Tools.
GM studies indicate that plugged or restricted transmission oil coolers and
pipes cause insufficient
transmission lubrication and elevated operating
Engine Heater
The engine coolant heater,
if available, can help in cold weather
conditions at or below -18 ВєC (0 ВєF)
for easier starting and better fuel
economy during engine warm-up.
Plug in the coolant heater at least
four hours before starting the
vehicle. An internal thermostat in
the plug-end of the c
