Help with Codes 63 & 98

I'm experiencing the typical intermittant high idle and rough running conditions. The codes I have are 63 which I think is the TPS set too low. I have searched and found some good info on this.

However, what is code 98 (Failure Mode Effects Management - hard fault present)? Is this due to the code 63 or something different?

Thanks in advance for any help with this.

KB
 
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