When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I'm getting code P1557. What is causing this? The code says Manufacturer Controlled Vehicle Speed, Idle Control, and Auxiliary inputs. Is this a sensor problem?
I've got P1557 as charge pressure control positive deviation. Your description would suggest to me that it is the throttle control module which requires replacing the whole throttle body.