Ok, the vast majority of the time, this is due to a faulty APP(accelerator pedal position) sensor, which is integrated into the gas pedal assembly. While less often, sometimes it will be a faulty EGR air flow, which on a diesel engine is essentially its throttle body.
Before replacing it either one, you need to have the computer scanned for fault codes which will tell you which of the two is faulty. Unless you live in California, you can run it by any major parts store and they will scan it for free and tell you which is at fault
Please remember to rate service using the rating page so that I may receive credit. Thanks
If for any reason, you can't rate my answer OKAY, GOOD, or EXCELLENT today.
Please reply and let me know why, so I can help more/better.
All follow up responses are FREE, after completing the required rating
Please note that if you have a subscription service, you still are required to rate service, however you are not charged again. This is just so that your expert is credited for their time and services.Thank you.