What kind of sensor does an EGR valve use?
A traditional and most common EGR position sensor is a three pin type with a reference voltage, Ground, and Signal. If the EGR valve in your car is vacuum actuated, perform the bench-test of the position sensor using a vacuum pump and a DMM.
How does the p0405 code work on the EGR sensor?
The information from the EGR position sensor is sent to the PCM which then decides the flow of exhaust gasses depending on how much the EGR valve opens. If the PCM calculation does not match with the data transmitted by the sensor, the P0405 code triggers.
How does the ECU adjust the EGR valve?
The ECU does this by applying a positive voltage to the DC motor to assist the spring with closing the EGR valve. When the throttle is released, the EGR valve is slightly opened again and the opening is further adjusted when the engine is back to idle speed again. Signal values may differ on different types of engine control units and EGR valves.
Why does the EGR valve open when the engine is warm?
Because the engine is warm, the ECU applies a negative voltage to the DC motor which makes the EGR valve open, which is visible in the slight drop of the position sensor signal voltage.
What are the diagnostic codes for CAT engine?
3251-2 Particulate Trap Differential Pressure : Erratic, Intermittent, or Incorrect: 2458-2 DPF #1 Differential Pressure Sensor : Erratic, Intermittent, or Incorrect: Troubleshooting, “Sensor Signal (Analog, Active) – Test” N/A: 3251-3 Particulate Trap Differential Pressure : Voltage Above Normal: 2458-3
What are the ISC codes for Cummins ECM?
449b Injector Metering Rail Number 1 Pressure – Data Valid But Above Normal Operating Range – Most Severe Level 449cl Injector Metering Rail Number 1 Pressure – Data Valid But Above Normal Operating Range – Most Severe Level 451 Injector Metering Rail Number 1 Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source
What is the oxygen sensor code for a Chevy?
P1137HO2S Bank 1 Sensor 2 Lean Or Low Voltage – Read Our Article On Oxygen Sensor CodesFor Help With This Chevy Trouble Code P1138HO2S Bank 1 Sensor 2 Rich Or High Voltage – Read Our Article On Oxygen Sensor CodesFor Help With This Chevy Check Engine Light Code
What is the diagnostic code for a Chevy check engine light?
Remember, these are manufacturer specific codes only. Refer to our Generic OBD II code list for definitions on all other Chevy diagnostic trouble codes. Manufacturer Specific Codes P0342Camshaft Position Sensor A Bank 1 Low Input – Related Information P1031HO2S Heater Current Monitor Control Circuit Sensors 1