Buick Regal: DTC P158A
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
DTC P158A
Cruise Control Calibration Incorrect
Circuit/System Description
For an overview of the component/system, refer to:Cruise Control Description and Operation (Without Adaptive Cruise Control) or Cruise Control Description and Operation (With Adaptive Cruise Control).
Conditions for Running the DTC
- Ignition/Vehicle=On
- Vehicle Speed.=Greater than 40 km/h (25 MPH)
- Cruise Control=On
Frequency the DTC runs=Continuously - After the running conditions are met - For greater than 5 s
Conditions for Setting the DTC
Engine Control Module Configuration Status in BCM=Cruise Control Configuration Mismatch
Actions Taken When the DTC Sets
- Cruise Control System Status=Disabled
- DTCs listed in the DTC Descriptor Category=Type C DTC
Conditions for Clearing the DTC
DTCs listed in the DTC Descriptor Category=Type C DTC
Reference Information
Schematic Reference
Cruise Control 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
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References
Circuit/System Verification
1. Ignition - On / Vehicle - In Service Mode.
2. Verify there are no other DTCs set, except for DTC P158A.
- If any other DTCs are set
- Refer to:Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If no other DTCs are set
NOTE: During the programming procedure, follow the Service Programming System (SPS) prompts for the correct ignition switch position.
3. Reprogram ECU - - K9 Body Control Module & K20 Engine Control Module.
4. Operate the vehicle within the Conditions for Running the DTC. - Verify the DTC does not set.
- 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:
Symptoms - Cruise Control
NOTE: The following steps must be completed before using the symptom
tables.
1. Before using the symptom diagnostic table, perform the Diagnostic System
Check - Vehicle in
order to verify the follow
Cruise Control Malfunction
Diagnostic Instructions
Perform the Diagnostic System Check prior to using this diagnostic
procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis:Strateg
Repair Instructions
CRUISE CONTROL SWITCH REPLACEMENT
Removal Procedure
1. Steering Wheel Airbag - Remove.
2.
Cruise Control Switch Bolt (1) - Remove.
3.
Using a flat bladed plastic trim tool remove the cruise contro
SEE MORE:
Front Wheel Drive Half Shaft Replacement - Left Side
Special Tools
J-45859 Hub Spindle Remover
DT-51504 Seal Protector
Equivalent regional tools:Special Tools
Removal Procedure
1. Raise and support the vehicle.
2. Remove the left front tire and wheel assembly.
3. With the aid of an assistant holding the brake pedal down, use a breaker bar
and
Power Seat Malfunction (Driver or Passenger without Memory A44 or
A45)
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.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
Diagnostic Fault
