Why did I get a code 71 after alt replacement
#1
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Why did I get a code 71 after alt replacement
1994 Lexus ls 400 After replacement of Alt, check engine light came on (code 71 ,45) .Did not even drive it.
No Problems before .Car runs fine, no idle or drivavailability problems . ???? Coincident of what ?
No Problems before .Car runs fine, no idle or drivavailability problems . ???? Coincident of what ?
Last edited by fixit188; 03-22-19 at 09:20 PM.
#2
Is the ambient temp sensor reading correctly in the car? The sensor is in the front right section of the car ahead of the radiator. Perhaps you did something to it while changing the alternator? Or it's just a glitch when you disconnected the battery. Clear codes and see if it goes away. The P0045 is a boost control flag, so that sounds totally bogus.
#3
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Did you disconnect both battery terminals before the alternator R&R? Most instructions say to remove the ground cable, but I believe it is a good idea to remove both on cars with all these electronic gadgets, computers, etc. (especially for alternator or starter R&R). Of course, that is hindsight now. Here is what I suggest:
- · Disconnect both terminals on the battery (always disconnect negative cable first)
- · Make sure battery is fully charged
- · Clean both terminals on battery
- · Clean both battery terminal cable connectors
- · Apply grease to battery terminals (or oil)
- · Reconnect terminals starting with positive cable first
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