Accelerator Sensor Malfunction

[dollinsa]

Hello,
I have a 2001 Prius with 77,000 miles plus. I am very new at trying to understand the workings of my vehicle, but I am trying.

Problem history:
Background: Recently the air conditioner has been performing less and less.

Sunday, on a curved down hill exit ramp the vehicle's steering went out. Then the consumption display screen showed three symbols: the power steering symbol, the main battery symbol and the triangle with the exclamation mark in it. The display screen that provides current speed also showed the triangle with the exclamation mark symbol. I drove the car about 1.5 miles to arrive at home. Later that evening I "played around" with what I think was the coolant overflow tubing. After that manuever, all of the symbols went away and have not returned.

I took the vehicle in to my local dealer on Monday. I was told that the problem was an accelerator sensor malfunction (approximate repair cost $550). The diagnostic code was ccsp1120. The service manager said that someone else had this problem this past week.

Does anyone have any thoughts about this? Any recommendations on what to read about this problem?

Thanks for any help you are able to provide.
Annie

[imports&minis]

heres some info on a tsb available

Some 2001 and 2002 model year Prius vehicles may exhibit a Master, Hybrid and M.I.L.
warning light “ON” condition if an abnormally low engine power output was detected
during a steady cruise or while gradually accelerating. If Diagnostic Trouble Code (DTC)
P1120 is present with one or more information codes (104–114) in the HV ECU, use the
following procedure to replace the accelerator pedal assembly.
�� 2001 – 2002 model year Prius vehicles produced BEFORE the Production Change
Effective VIN shown below.
MODEL COMPONENT PRODUCTION CHANGE EFFECTIVE VIN
Prius Pedal Assembly, Accelerator JT2BK18U*20055918
PREVIOUS PART NUMBER CURRENT PART NUMBER PART NAME QTY
78010–47030 Same Pedal Assembly, Accelerator 1
Refer to the SFI section in the applicable Prius Repair Manual, Volume 2 for instructions
to replace the accelerator pedal assembly.
TOOLS & MATERIALS QUANTITY
Standard Metric Socket Set and Hand Tools As Required
OP CODE DESCRIPTION TIME OFP T1 T2
552011 R & R Accelerator Pedal Assembly 0.2 78010–47030 04 99
Applicable Warranty*:
This repair is covered under the Toyota Comprehensive Warranty. This warranty is in
effect for 36 months or 36,000 miles, whichever occurs first, from the vehicle’s
in-service date.
* Warranty application is limited to correction of a problem based upon a customer’s specific complaint.
ENGINE
Introduction