Just took my vehicle out of storage and got a CEL. Scan is showing P0492 - Lower Limit Not Reached. Dealer wants to replace the secondary injection pump for close to $4k. They claim this is the starting point to clear/re-scan. Anything else that can be done?

 

Hello @JudgeKin ,
Welcome to 6speedonline !

Please tell us the year, model of your Bentley, along with which engine you have.

As to your issue, I am not sure where the terminology "Lower Limit Not Reached" is coming from, as P0492 is in regards to "Insufficient Flow", therefore, I would confirm the operation of bank two's secondary air pump itself, and most importantly first off, the plastic line/hose which runs from the bank 2 SAI pump to the bank 2 combo valve on the driver's side front of the engine, that is, facing the engine from the front, this is of course assuming that you have a W12, I would also check the fuse and relay for the bank 2 pump as shown.
As to the $4k quote, ridiculous, the oem pump part number 06A959253E lists for $971+/-, but there are many options ranging from $80 to $300 that will do the job

I await your details as to year model and engine, as fuse numbers and location change throughout the years.

Johnny

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@JudgeKin ,
What was the outcome here ?

Johnny