Chart 20
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2018 Lincoln Navigator, 2018 Lincoln MKZ, 2018 Lincoln MKX, 2018 Lincoln MKT, and 2018 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
- Engine Noise (under hood)
NOTE:
Attempt to identify the source of the noise. If the noise is from a source other than those listed below, refer to NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX (for noise such as spark knock) or the applicable Service Information article to continue diagnosis.
| SYSTEM/COMPONENT | REFERENCE (Pinpoint Test unless noted) |
|---|---|
| Secondary Ignition System | CHECK for a snap noise that may be due to secondary ignition arcing. For KA 1.5L TIVCT or Fiesta 1.6L TIVCT, GO to PINPOINT TEST JC . For all others, CHECK the condition of the spark plug boots. |
| Turbocharger System | REFER to the appropriate Engine Controls - Fuel Charging And Controls - Turbocharger article to diagnose the turbocharger noise. |