P2457 Code on 2010 diesel x5

cj777 · 10-22-2018, 11:04 AM

I recently acquired a 2010 x5 35d with about 95,000 miles. I replaced the malfunctioning thermostat about 3 months ago and followed the tightening procedure for the EGR cooler. Everything seemed to be fine until this week when I received the P2457 Exhaust Gas Recirculation Cooling System Performance code. What does this code actually mean? Is there a leak in the EGR cooler? If so, is there a risk of hydrolocking the engine if I continue to drive it? Any troubleshooting tips to help get this resolved would be appreciated. Thanks in advance

RichardR0404 · 10-22-2018, 06:37 PM

Could very likely be a vacuum leak, check for that since EGR is vacuum operated

oil_burner · 10-23-2018, 11:32 AM

Quote:

Originally Posted by RichardR0404

Could very likely be a vacuum leak, check for that since EGR is vacuum operated

Or it could be a clogged EGR cooler. If you aren't losing a lot of coolant then i don't think you should worry about the cooler leaking.

10-22-2018, 11:04 AM	#1
cj777 New Member 0 Rep 8 Posts Drives: z4 Join Date: Jul 2014 Location: nc iTrader: (0)	P2457 Code on 2010 diesel x5 I recently acquired a 2010 x5 35d with about 95,000 miles. I replaced the malfunctioning thermostat about 3 months ago and followed the tightening procedure for the EGR cooler. Everything seemed to be fine until this week when I received the P2457 Exhaust Gas Recirculation Cooling System Performance code. What does this code actually mean? Is there a leak in the EGR cooler? If so, is there a risk of hydrolocking the engine if I continue to drive it? Any troubleshooting tips to help get this resolved would be appreciated. Thanks in advance
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10-22-2018, 06:37 PM	#2
RichardR0404 Private First Class 31 Rep 189 Posts Drives: 2013 BMW X5 35D Join Date: Dec 2017 Location: Calgary iTrader: (0)	Could very likely be a vacuum leak, check for that since EGR is vacuum operated
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