Cadillac XTS Exhaust and Emissions: 4 Symptoms Worth Taking Seriously (2013-2019)

Most exhaust and emissions problems announce themselves well before they strand anybody. On a 2013-2019 XTS, these are the ones worth acting on.

1. An exhaust tick on cold start that quiets as the manifold expands

It rarely gets better on its own, and it usually gets louder before it gets expensive. Start by looking at catalytic converters.

2. A check engine light that appears after fueling and clears itself

This is the symptom people put off longest and regret most. Start by looking at oxygen sensors.

3. A diesel that regenerates far more often than it used to

This one is usually early, which is good news, because it is cheap to fix early. Start by looking at diesel particulate filters.

4. A P0420 or P0430 efficiency code

This one is usually early, which is good news, because it is cheap to fix early. Start by looking at DEF injectors.

What to Do Next

Not scheduled. Converters are warranted separately under federal emissions rules, so check coverage before you buy.

Emissions equipment varies by state of original sale on some model years.

We stock genuine GM parts for every nameplate on this list and ship nationwide from Dallas. Start at our Cadillac OEM parts catalog, or search for XTS catalytic converters if you already know what you need.

Where to Buy

• Genuine Cadillac OEM parts
• Catalytic Converters
• Oxygen Sensors
• Def Injectors
• Diesel Particulate Filters
• Wholesale account setup