I have a 2007 Malibu engine code reads as PO 128( thermostat), PO 463(fuel level sensor) and PO 760 (trans indicator lamp). My question is could one thing cause all three things to go out at the same time? Or is my luck so crappy that three seemingly unrelated things all went out at the same time? I only ask this because this all happened after I let my 20 year old son drive the car.

 

<!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <wontGrowAutofit/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} </style> <![endif]--> Cynthia Owens,

I’m sorry you are experiencing these issues with your vehicle. The possible causes for the codes you have listed are listed below. These are just possible causes; this is not meant as a diagnosis. I recommend having the vehicle diagnosed by a certified technician. They will be able to offer additional information after inspecting the vehicle.

P0128
Possible causes:
- Leaking or stuck open thermostat
- Low engine coolant level
- Insufficient warm up time
- Faulty engine coolant temperature sensor
- Engine coolant temperature sensor harness is open or shorted
- Engine coolant temperature sensor circuit poor electrical connection

P0463
Possible causes:
- Faulty fuel level sensor
- Fuel level sensor circuit harness is open or shorted
- Fuel level sensor circuit poor electrical connection

P0760
Possible causes:
- Low transmission fluid level
- Dirty transmission fluid
- Faulty shift solenoid C valve
- Shift solenoid C valve harness or connectors
- Shift solenoid C valve circuit is open or shorted

Louis
GM Customer Service