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Battery No Charge and Error codes
These are for 4.9L
P016-generator voltage out of range--Voltage is below 10 volts or above 16 volts with engine at 500rpm.
P030-Idle speed control (ISC) out of range--Check ISC for operation
A047-very low A/C refrigerant condition warning--check refrigerant level
I039-speed sensing suspension (SSS) fault--this one requires a lot of testing. Could be anything from bad connection at a strut, to bad ground, to bad strut.
I041-battery voltage too low--at 800 rpm, voltage is less than 10.6 volts
I052-keep alive memory error--means IPC lost voltage, and reset. Normal if battery was disconnected, or lost voltage.
These codes are for 4.6L
I039-loss of road sensing suspension (RSS) data--might need to replace rss module
P016-generator voltage out of range--same as above.
If you need anything else, let me know.
on May 27, 2020
My 94 cadillac deville 4.9L stalls and the engine
I039 is a road sensing suspension problem, I042 is battery voltage too high. I would first try to clear the codes and try to figure out why the voltage is too high - often a faulty regulator in the generator.
You also seem to have a battery drain problem - something besides the keep-alive circuit is drawing it down. First check all lights (including trunk and under hood) and the rear air compressor when the car is turned off.
Road sensing problem could because of the high voltage, but could also be one of the height sensors at each wheel is detached or broken, or the RSS module has given up the ghost.
on Sep 12, 2017
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