Low Volts
Thread Starter
Advanced
Joined: Aug 2007
Posts: 57
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From: Yorkville IL
Low Volts
'93, 75,000 miles, automatic.
Before I go out and spend money on differant parts, I wanted to ask. My car started to through a code 41, at the same time I noticed that the volts started reading low. Normal before this 14.6 and now reading 14.1, could this be part of the problem?
Before I go out and spend money on differant parts, I wanted to ask. My car started to through a code 41, at the same time I noticed that the volts started reading low. Normal before this 14.6 and now reading 14.1, could this be part of the problem?
Instructor
Joined: Dec 2004
Posts: 231
Likes: 0
'93, 75,000 miles, automatic.
Before I go out and spend money on differant parts, I wanted to ask. My car started to through a code 41, at the same time I noticed that the volts started reading low. Normal before this 14.6 and now reading 14.1, could this be part of the problem?
Before I go out and spend money on differant parts, I wanted to ask. My car started to through a code 41, at the same time I noticed that the volts started reading low. Normal before this 14.6 and now reading 14.1, could this be part of the problem?
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
Here is what is normal for C4's. Engine cold, the alternator puts out 14.7 volts and your dash meter will read 14.3 volts due to the voltage drop in the ignition switch and the dash voltmeter reading the voltage AFTER the ignition switch contacts. The alternator output voltage decreases with increasing temperature and it puts out 13.7 volts engine up to temperature (and the alternator too). Your 14.1 volt reading is within normal range even though you have read 14.6 volts before.
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
Agree with JFB on the volts situation.
Code 41 if it was in the CCM module 1, that would be data communications lost. But probably not.
If it was the ECM module 4, than it could be EST (knock sensor) error, according to the info I have at this time which is not out of the FSM. Best I have for now.
Code 41 if it was in the CCM module 1, that would be data communications lost. But probably not.
If it was the ECM module 4, than it could be EST (knock sensor) error, according to the info I have at this time which is not out of the FSM. Best I have for now.
