2013 Cadillac P0401: What It Means & Is It Safe to Drive?
P0401 on the 2013 Cadillac: Exhaust Gas Recirculation Flow Insufficient. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
PowertrainMedium urgency
What this code means
The EGR system is not flowing enough exhaust gas. Usually due to carbon buildup or a stuck valve.
Common causes on the 2013 Cadillac
- Carbon-clogged EGR valve or passages
- Faulty EGR valve
- Faulty EGR position or differential pressure sensor
Symptoms
- Check Engine Light
- Rough idle, hesitation
- Knock under acceleration
Typical fixes
- Clean or replace EGR valve
- Clean EGR passages in intake
- Replace EGR sensor if applicable
Repair cost range
For a 2013 Cadillac, repairs for P0401 typically fall between $150 and $600, depending on the root cause and labor rates in your area.
Known issues on Cadillac
Cadillac P0401 insufficient EGR flow on 3.6L engines is carbon buildup in the EGR passages and valve. On ATS 2.0T, the EGR cooler should be inspected for coolant leaks before cleaning the valve—a leaking cooler contaminates the intake and causes repeat P0401 codes.
Most commonly affected models
SRX 3.6L 2010–2016CTS 3.6L 2014–2019ATS 2.0T 2013–2019