EGR temperature refers to the temperature of exhaust gases recirculated back into the engine's intake system through the Exhaust Gas Recirculation (EGR) system. This process helps reduce nitrogen oxide (NOx) emissions by lowering the combustion temperature. Monitoring EGR temperature is crucial for optimizing engine performance and ensuring compliance with emissions regulations. High EGR temperatures can indicate issues such as clogging or malfunctioning components within the system.
EGR sensor ( gas temperature sensor ) is monted near the EGR valve, which is install into the EGR tube.
The EGR temperature sensor is located in the intake manifold between cylinders 3 and 4
On the EGR valve assembly.
The EGR valve and the EGR sensor work together. The EGR gas temperature sensor is mounted near the EGR valve. The sensor detects the temperature of the exhaust as it moves through the valve. The information is sent to the ECM and in turn the EGR on/off time is regulated precisely and more efficiently. Any malfunction with the EGR gas temperature sensor will set off a code 35 ( Info taken from HAYNES MANUAL)
The EGR temperature sensor on a Volvo D16 engine is typically located on the exhaust gas recirculation (EGR) system, specifically near the EGR cooler or manifold. It measures the temperature of the exhaust gases before they enter the EGR system. To locate it precisely, refer to the engine's service manual, as the exact position can vary by model and year. Make sure to follow safety protocols when inspecting or replacing the sensor.
The EGR valve is connected above the water hose on the 2002 Mazda Millennia. The EGR valve is responsible for lowering the temperature of the fuel.
Remove the wiring harness from the EGR temperature sensor. Remove the two retaining screws from the sensor. Reverse the process to install the new sensor.
Exhaust gas recirculation. The egr meters a small amount of exhaust gas back into the engine. This gas lowers the combustion temperature which lower the a mount of oxides of nitrogen in the exhaust.
The P1409 OBD-II code indicates an issue with the Exhaust Gas Recirculation (EGR) system, specifically related to the EGR temperature sensor circuit. This code suggests that the engine control module (ECM) has detected an abnormal reading from the EGR temperature sensor, which can lead to increased emissions and engine performance issues. Common causes include a faulty EGR valve, a malfunctioning temperature sensor, or issues with wiring and connectors in the EGR system. It is advisable to diagnose and address the problem to maintain optimal engine performance and compliance with emissions standards.
My Toyota manual for a 1991 Corolla DX says that error code #71 is used only for California specifications. Here is the official diagnosis, according to the manual: the EGR gas temperature sensor signal (THG) is below the total temperature of the intake air temperature plus 55 deg Cent. (99 degrees F) after driving for 25 seconds in EGR operation range. The manual then lists five trouble areas: 1- Open in EGR temperature sensor circuit; 2- Open in VSV circuit for EGR, 3- EGR vacuum hose disconnected, valve stuck; 4- Clogged in EGR gas passage; 5 - ECU.
My service manual says this occurs if the engine coolant temperature (ECT) is above 60C with the EGR temperature less than 70C for 50 seconds. There is a long flowchart too complicated to list but it basically says it's one of the following: 1. Open or short from the EGR temperature sensor to the ECM. 2. A bad EGR temperature sensor. 3. An open connection (BLK/RED) between the fuse/relay box and the EGR SV (solenoid vacuum valve which is next to the EGR valve. The fuse and relay box is located on the driver side in the engine compartment. It contains relays and large amperage fuses. 4. A bad EGR SV valve 5. A bad ECM I have never had to look into this error so I cannot comment further. Hope this helps.
Yes.