OBD-II code · Powertrain (generic)
P041A EGR Temperature Sensor B Circuit
A general electrical fault on EGR temperature sensor B — open, shorted, or out of plausibility. The sensor monitors recirculated exhaust gas temperature for EGR cooler protection and dosing.
Is it safe to drive with P041A?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor failed
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 h
- Emissions test
- Likely to fail
- Parts involved
- Egr Temperature Sensor
Related codes
- P040AEGR Temperature Sensor A Circuit
- P04CEEGR Temperature Sensor C Circuit
- P04E5EGR Temperature Sensor D Circuit
- P0417Secondary Air Injection System Switching Valve B Circuit Shorted
- P0418Secondary Air Injection System Relay "A" Circuit Malfunction
- P0419Secondary Air Injection System Control B Circuit
- P041BEGR Temperature Sensor B Circuit Range/Performance
- P041CEGR Temperature Sensor B Circuit Low
- P041DEGR Temperature Sensor B Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.