Just a little info. I hope it helps someone. Daughter calls me and said her 2001 santa fe 2.7 just died while waiting at a light. So I drove 10 miles to find her - took my Pocketscan to check the trouble codes. She also told me the car had been occasionally lunging forward while waiting at stop sign. Hooked up the Pocketscan - P0118, engine coolant temp sensor. Hmm, car didn't overheat. Nothing makes sense so far. Drove the car home - car lunged while driving down the road. Next day, hooked up scanner again - P0118. Started the car - car idles where it supposed to be, right about 600 rpm. All of a sudden the rpm's shoot up to 1500 for about a minute then slowly returns to normal, then dies. Scanner still P0118. Had my wife pick up the ect sensor since she was already at the dealer for recall repairs o her car - $35. Went back, started the car again - this time rpm's shoot up to over 2500 and is not returning to idle. Anyway, replaced the ect sensor (get oem part. Some reading has led me to believe anything less is futile.) So far all is good. Its been a week.
