OBD-II code · Powertrain (generic)
P044D EGR Sensor C Circuit High
EGR sensor C above upper plausibility — open signal or short to B+. EGR mixes inert exhaust into intake to lower combustion peak temperature — too little raises NOx, too much causes misfires and rough running.
Is it safe to drive with P044D?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen signal line
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Symptoms
- Check engine light on
- Pinging or knocking under load
- Power loss and hesitation
- Possible rough idle
- Failed emissions inspection (NOx)
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Egr Valve
Related codes
- P044AEGR Sensor C Circuit
- P2381EGR Sensor D Circuit High
- P2386EGR Sensor E Circuit High
- P044BEGR Sensor C Circuit Range/Performance
- P044CEGR Sensor C Circuit Low
- P044EEGR Sensor C Circuit Intermittent/Erratic
- P044FSecondary Air Injection System Switching Valve A Circuit High
- P0450EVAP System Pressure Sensor/Switch A Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.