SC430 VSC OFF Light (flashing), MIL and codes

[scottu5]

Hello,

New to this forum and would appreciate any help or advice.  The car is a 2008 SC430 with around 62k miles (doesn't get driven much).  Been working well till today.

Riding very rough (like a flat spot on a tire or a flat).  Can feel the roughness immediately and it gets worse with speed.  If you lift off the throttle, slight worse, apply power, slight better.

VSC OFF Light is on and flashing, VSC symbol light is on and MIL is on (steady).  Codes are;  P0300, P0102 & P0113.

Any suggestions where to start or ideas what this is?

Thank  you,

scott

[RX400h]

P0300 LEXUS code possible causes

• Faulty spark plug (s)
• Faulty ignition coil (s)
• Clogged or faulty fuel injector (s)
• Intake air leak
• Fuel injectors harness is open or shorted
• Fuel Injectors circuit poor electrical connection
• Ignition coils harness is open or shorted
• Ignition coils circuit poor electrical connection
• Insufficient cylinders compression
• Incorrect fuel pressure

P0102 LEXUS code possible causes

• Faulty mass air flow sensor
• Intake air leaks
• Dirty mass air flow sensor
• Dirty mass air filter
• Mass air flow sensor harness is open or shorted
• Mass air flow sensor circuit poor electrical connection

P0113 LEXUS code possible causes

• Faulty Intake Air Temperature (IAT) sensor
• Dirty air filter
• Intake Air Temperature (IAT) sensor harness is open or shorted
• Intake Air Temperature (IAT) sensor circuit poor electrical connection

[scottu5]

Thank you sir.

scott