UK Car Repair Questions? Ask a Mechanic for Answers ASAP
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It does sound like you do have a throttle fault. What kind of scanner did you use?
Pecus E means that the ecm is either offline or not communicating hence not being able to use your scan tool. You need to check all powers and grounds to the ecm and the engine management relay. I will send you the wiring info in the next post.
Here is the wiring diagram.