My '07 GX470 ran DTC P0456 and the traction control and check engine light came on. After researching on the Internet, worn springs in the gas cap turned out to be the number one culprit. This was the cheapest solution and therefore the logical first step in the replacement/troubleshooting process. I ordered this gas cap and the delivery was faster than promised. When it arrived I replaced the old cover and drove normally (didn't disconnect the battery to reset the codes). After two days of normal driving, the dashboard warning lights went off again and the trouble code disappeared. Very satisfied with the seller's service and the overall result.
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