What kind of trouble code is p0402?
The check engine light on my 2000 Ford Taurus 24 Valve DOHC V6 came on and after scanning with an OBD2 Scan Tool, I received an P0402 (excessive EGR flow). I replaced the DPFE sensor and , since the car was ‘missing’, I also replaced the spark plugs (the car has 40K miles).
Is there a problem with the EGR valve p0402?
With a P0402, it is common for people to replace the EGR valve, only to have the problem return. The most likely solution is to replace the DPFE sensor. Check the voltage at the DPFE sensor both at idle and when the EGR is open Related EGR codes: P0400, P0401, P0403, P0404, P0405, P0406, P0407, P0408, P0409
When do I need to fix error code P0420?
If the voltage of the downstream O2 sensor is constantly jumping between 0.1V and 0.9V, the catalyst is worn and the catalytic converter needs to be replaced. Estimated Cost of Repair For error code P0420, one or more of the below repairs may be needed to solve the underlying issue.
What could cause all four 02 sensors codes to continue to show Bad?
What Could Cause All Four 02 Sensors Codes to Continue to Show Bad… What could cause all four 02 sensors codes to continue to show bad? On computer even after all sensors were replaced? I have a check engine light that has been on before I bought vehicle. I had the codes checked p0054 code and all four o2 sensors are displayed on computer.
How to fix the p0402 OBD-II trouble code?
What repairs can fix the P0402 code? 1 Replacing the stuck open EGR valve 2 Replacing a broken catalyst in the exhaust 3 Replacing an EGR temperature sensor or cleaning the carbon off of it to repair it if it registers too much of a temperature change 4 Replacing the EGR backpressure control valve
What does the P0420 code on the O2 sensor mean?
The P0420 code means that rear O2 sensors report to the engine control module that the catalytic converter is not doing it’s job properly. The rear O2 sensor is comparing the signal from the front O2 sensor. How to clear code P0420? To clear the P0420 code you need to use an OBD2 scanner.
What causes the p0402 code on an EGR?
Code P0402 is triggered when the EGR temperature sensor sees more of a temperature change than the EGR has commanded to open. This is usually caused by the EGR backpressure control valve getting a burnt diaphragm from the exhaust backpressure over time or from a partly blocked catalyst. Need help with a P0402 code?
How can I fix the P0420 code on my catalytic converter?
To fix the P0420 code, you need to diagnose what is causing the trouble code. Start with inspecting and diagnosing your catalytic converter and continue with checking the O2 sensors. What can cause a P0420 code? A bad catalytic converter is the most common cause of the p0420 code.