Chart 20
WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2012 Lincoln Navigator L, 2012 Lincoln Navigator, 2012 Lincoln MKZ, 2012 Lincoln MKX, and 2012 Lincoln MKT. 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 appropriate Service Information article
to continue diagnosis.
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|---|
Secondary Ignition System
|
For vehicles equipped with a coil pack ignition system, GO to PINPOINT TEST JC
. For all others, CHECK the condition of the spark plug boots. |
| Turbocharger System | REFER to the appropriate Fuel Charging and Controls article - Turbocharger to diagnose the turbocharger noise. |