Hopefully you'll all had a good xmas and break so far
We noticed our (T7 308 2.0 HDi with 213K on the clock) car was slow to accelerate, so I popped by a local non dealership garage today who specialises in Euro cars and he ran a scan with their Autel scanner. This picked up the following codes
P0402 'Intermittant' air circuit quality of cold ai below the setting
P0488 'Intermittant' refer service manual (but I looked up and it says EGR Throttle Position Control)
P0490 'Intermittant' EGR valve position incorrect (too closed)
P0409 'Intermittant' EGR valve detected jammed closed during ECU switching to dormant phase
The current conclusion without further diagnosis is the EGR valve is stuck closed. He advised this is not a critical issue and we can continue to use the car until the issue is resolved as long as we don't mind extra emissions
Questions
1. Can the car be used without risk for the present as advised?
2. In a post here it is said that a stuck EGR valve can be verified by disconnecting the EGR sensor (on the EGR valve housing) as the performance issue should stop. Is that recommended? if so I found that that sensor is in an extremely difficult place to access and I'm not sure whether I can disconnect (without removing various pipes) and if I did remove I'm not sure whether could get it back on (is there an easy method or alternative diagnosis that can be done?)
3. Should I replace with a new valve or get one from a wreaker (a 2nd hand one could risk the same issue again dependin go the age of the donor car)
Any suggestions or advice appreciated
We noticed our (T7 308 2.0 HDi with 213K on the clock) car was slow to accelerate, so I popped by a local non dealership garage today who specialises in Euro cars and he ran a scan with their Autel scanner. This picked up the following codes
P0402 'Intermittant' air circuit quality of cold ai below the setting
P0488 'Intermittant' refer service manual (but I looked up and it says EGR Throttle Position Control)
P0490 'Intermittant' EGR valve position incorrect (too closed)
P0409 'Intermittant' EGR valve detected jammed closed during ECU switching to dormant phase
The current conclusion without further diagnosis is the EGR valve is stuck closed. He advised this is not a critical issue and we can continue to use the car until the issue is resolved as long as we don't mind extra emissions
Questions
1. Can the car be used without risk for the present as advised?
2. In a post here it is said that a stuck EGR valve can be verified by disconnecting the EGR sensor (on the EGR valve housing) as the performance issue should stop. Is that recommended? if so I found that that sensor is in an extremely difficult place to access and I'm not sure whether I can disconnect (without removing various pipes) and if I did remove I'm not sure whether could get it back on (is there an easy method or alternative diagnosis that can be done?)
3. Should I replace with a new valve or get one from a wreaker (a 2nd hand one could risk the same issue again dependin go the age of the donor car)
Any suggestions or advice appreciated
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