GT JTDm ECU errors P0226 & P0704
I have a 2005 GT JTDm and I'm having problems with the engine control systems failure light coming on. I have the FiatECU scan software and when I check the stored errors I find the following two error codes 'P0226 - TP Sensor/Switch' and 'P0704 - Transmission/Gear Sys'. Error code P0226 causes the light to stay on and relates to the throttle position sensor and the error P0704 is for clutch pedal switch signal circuit malfunction.
When the errors occurs the throttle is very lumpy with drops in power & often goes into limp home mode, quite often stopping and keying off for a few minutes stops these affects, the light still stays on but the errors aren't live. Clearing the codes with FiatECUscan seems to work for a few days or weeks but eventually the problem comes back.
Has anyone had this problem before? Do I need to replace the throttle pot? Is there anything that can be done with the diagnostic software which will help? I have read about the ECU reset, would this help in this case?
I am due to have the car serviced next week and could get them to do any work if need be.
Any help would be appreciated on this.