P044D
EGR Sensor C Circuit High
EGR / emissions
Generic OBD-II
Medium
What it means
P044D means the ECM sees an abnormally high voltage on the "C" exhaust-gas-recirculation (EGR) feedback sensor circuit — usually an open circuit, a wiring fault, or a failing sensor. It's an emissions-monitoring fault rather than a running problem, so the car often drives normally, but EGR flow may not be regulated correctly until it's repaired.
Medium
Can I keep driving? Usually fine to keep driving short-term — this is an emissions sensor fault, not a running problem, though EGR control may be affected until it's fixed.
Common symptoms
What you'll notice
- Check-engine light on
- Often no noticeable driving symptoms
- Possible pinging or knock under load if EGR flow is misjudged
- May fail an emissions/readiness test
Common causes
Most likely first
- Faulty EGR position/feedback sensor ('C')Likely
- Open or short-to-power in the sensor signal wiring (high voltage reading)Common
- Corroded or loose sensor connectorCommon
- Carbon buildup affecting valve position the sensor reportsLess often
- ECM/PCM fault (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the code with a scan tool.
- Inspect the EGR sensor connector and wiring for damage, corrosion, or an open circuit.
- Back-probe the sensor signal voltage and compare against the expected range.
- Clean the EGR valve and passages if carbon is affecting position feedback.
- If wiring and connections are good, replace the EGR sensor. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P044D?+
Generally yes for the short term — it's a sensor circuit fault. Get it fixed so EGR is controlled correctly and to pass emissions.
Can I just clear P044D?+
It will return until the sensor or its wiring is repaired. Clearing only resets the light.
Related codes
Often seen with P044D
Read & clear P044D yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX