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2000 Taurus I have a Taurus with the same trouble code you posted. I was wondering if you found out what the code (P1633) meant and what to do to correct it. Kelly

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How do i find the KAPWR circut

Replacing parts to fix a fault can cost you a lot of money, and still not fix the fault. A scanned code tells where the fault may be ,but not which part to replace. Google ( Ford P1605 Code - PCM Keep Alive Memory Error). for more info.

Jul 09, 2015 | 2001 Ford Taurus

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2001 ford Taurus code P1633 what does it mean and how do I fix it ?

P1633 - Keep Alive Power Voltage Too Low

Indicates that the Keep Alive Power (KAPWR) circuit has experienced a power interrupt.

Possible causes:
-Open KAPWR circuit.
-Damaged PCM.
-Intermittent KAPWR Circuit.

First thing would be to check the fuse associated with the KAP. In your case, that would be fuse #22 (10A). If you're A/C doesn't work, then that's why. Usually the A/C clutch causes the fuse to blow and your get your P1633 code.

If the fuse is fine and the A/C works, then it might be a bad PCM. If the battery was bad before it might have set this code. Have you tried clearing the codes to see if it comes back or not?

Feb 20, 2015 | 2001 Ford Taurus

2 Answers


Ford Taurus model???
this is for ford T 2000
p1633 keep alive memory test failure

Jul 19, 2014 | Ford Taurus Cars & Trucks

1 Answer

Whats the p1633 code?

Possible causes - Open Keep Alive Power (KAPWR) circuit - Faulty Powertrain Control Module (PCM)

Read more:

Jul 08, 2014 | 2003 Ford Taurus

1 Answer

05 taurus code p1633 stalls at idle or when slowing down

The KAM circuit for the PCM and the a/c is on the same circuit.
If the PCM does not have memory voltage it will loose the settings every time you turn the key off.
You might want to check the fuses in the engine compartment for a blown fuse for this circuit.
Of course it could have another problem too, such as a faulty idle air control valve.

Jun 29, 2012 | Ford Taurus Cars & Trucks

2 Answers

Code p1633 keeps coming up on check engine light how to fix it


Sep 04, 2011 | 2005 Ford Taurus

1 Answer

I have a 2004 Ford Taurus. About a week ago, the A/C clutch started making noise. I disconnected the plug, as I can not afford a new compressor, at this time. Two days later, the "Check...

The P0511 code is for the idle air control circuit and the P1633 is stating the the KAM voltage is too low. My guess is if you are having issues with the Idle air control circuit this could cause stalling, especially if the valve is not functioning properly and allowing too much air at idle, this causing the car to stall. I can't imagine that by pulling the connector on the A/C compressor you would get either of these codes. Have you checked for corrosion on the battery or proper battery voltage level? Here is a forum that may be of some help for trouble areas to look for (regarding P1633):
As far as P0511 goes if you notice any hooting type noise that is a sure indicator of a faulty IAC valve, if not then I would say first check that you do have proper output from your battery/alternator and then either take it to get properly diagnosed or try to check the circuit yourself.

Apr 12, 2011 | 2004 Ford Taurus

1 Answer

It has a cheek enigen on and give the code P1633

When the Taurus PCM (Powertrain Control Module)(aka "the car's computer"), sees 9V DC (or less),
it sets the code P1633, so it means your battery's voltage was low recently. But since the computer
retains the code until it is reset, the battery voltage may be OK now. This is typical for cars
that have sat for awhile, and the tiny current drain of the clock slowly drains the battery until
the voltage drops below 9 Volts. Normal car Battery voltage is 12 Volts.
Fix: check the battery (with a DMM (digital multimeter)), and reset the code (with a code reader).
Workaround: have Advance/Autozone/PepBoys check the battery (free) and ignore the code.

Jan 17, 2011 | 2002 Ford Taurus

1 Answer

2002 Taurus: 2002 taurus has p1633 code. what does it mean...

The code is for ( Keep Alive Power Voltage To Low ) Description: is the KAPWR has experienced a power interrupt. Possible problems: Open KAPWR circuit... Damaged PCM ...or a intermittent KAPWR circuit

May 18, 2010 | 2002 Ford Taurus

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