I recently purchased a 2010 G37 with 132,000 miles. The car as a problem with the power steering and also has a reoccurring check engine light with code P0181 for the Fuel Temp sensor. Google didn't turn up any common fixes except replacing the fuel pump assembly, that runs about $350. I've been using OBDFusion and a Veepeak Bluetooth OBD to monitor the fuel temps and they can vary between as low as 80F to 135F when driving and while parked. I was hoping someone else might be able to provide some normal reference values for comparisons sake. In park, if I bring the engine off idle to around 1500 RPM, fuel temps drop about 10F. This is a return-less fuel system, correct?
Thanks for any help!