- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
my book does not show a code 18 problem but it refers to knock sensor fault front as high voltage . Replace the knock sensor
knock sensor are used to tell the CPU to alter the fuel air ratio and the ignition timing to suit rpm's and load . If it is out then the code 18 may be the result .
Code 18 is a spout circuit problem. You probably need the flow chart to check all of the components in that circuit which include the ecm, the temp sensor, and the engine control module among other things.