Pinpoint Test C: Surface Rust Or Degradation Of Surface Treatment
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- NOTE: Surface rust is a characteristic of materials used on exhaust systems. Exposure to heat or road salt may result in surface rust.
Normal Operation and Fault Conditions
REFER to: Exhaust System - Overview .
Possible Sources
- Perforated catalytic converter/exhaust system
Visual Inspection and Pre-checks
- Inspect for loose, damaged, contaminated or incorrect components.
- C1 CHECK THE EXHAUST SYSTEM FOR PERFORATIONS, RUST OR DAMAGE
- Visually inspect the exhaust system, paying specific attention to joints, bends, low points and check for rust, perforations or surface degradation.
Are perforations, rust or damage present?
Yes INSTALL new components as necessary. No GO to C2 - C2 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION
- Using a diagnostic scan tool, perform the PCM self-test.
Are the powertrain controls operating correctly?
Yes The condition may be intermittent. Advise the customer no repair is required. No Correct and fix any powertrain control issues. Using a diagnostic scan tool, perform the PCM self-test. Test and confirm the issue has been resolved.