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2000 Ford Windstar failed inspection for emission. DMV readout says code P1633. What is it, and how do I fix it? This code is not in Chilton repair manual.

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The code is "Keep Alive Power Voltage Too Low" perhaps you can find something in chilton's regarding this error. Appears to be a communication error

Posted on Jun 18, 2009

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I have 2000 mustang 3.8 n it shakes really bad n code p1633 comes back. Whats wrong n how do i fix it


Hello Paige ! It sounds like you have a sick vehicle , lets see if I can help you fix it . Well the code you have has to do with lack of voltage to the ECM -engine control module.
P1633 - Keep Alive Power Voltage Too Low Indicates that the Keep Alive Power (KAPWR) circuit has experienced a power interrupt.
  • Open KAPWR circuit
  • Damaged PCM
  • Intermittent KAPWR Circuit
2000 PCED On Board Diagnostics II SECTION 5: Pinpoint Tests Procedure revision date: 01/31/2001 QB: Diagnostic Trouble Code (DTC) P0603/P1605/P1633 > QB: Introduction QB1 CHECK BATTERY TERMINALS
    Note: If KAPWR is interrupted to the PCM (that is, when a breakout box is installed or the battery is disconnected), DTC P0603/P1605 can be generated on the first power-up.
  • Inspect the battery cables for loose connections, corrosion.
Are the battery terminal connections in good condition? Yes No KEY OFF. Battery terminals are OK. GO to QB2 . REPAIR battery terminals as necessary. QB2 INSPECT ENGINE COMPARTMENT FOR PROPER WIRE ROUTING
  • Inspect Electronic Engine Control (EC) System wiring for proximity to ignition components or wires.
Is wiring too close to ignition components or wires? Yes No REROUTE as necessary. Engine compartment wire routing is OK. GO to QB3 . QB3 CHECK KEEP ALIVE POWER (KAPWR) TO PCM
    Note: Refer to the PCM connector pin numbers in the beginning of this pinpoint test.
  • Disconnect PCM.
  • Measure voltage between KAPWR circuit at the PCM harness connector and ground.
  • While observing digital multimeter, grasp the Electronic EC harness and wiggle, shake or bend a small section while working from the PCM to the dash panel.
Does the voltage reading indicate less than 10.5 volts? Yes No ISOLATE and REPAIR open circuit. No open in KAPWR harness circuit detected. GO to QB4 . QB4 CHECK FOR REPEAT OF DTC P0603/P1605/P1633
  • Reconnect PCM.
  • Start engine and allow it to reach operating temperature.
  • Run Key On Engine Off Self-Test.
  • Retrieve Continuous Memory DTCs.
Is DTC P0603, P1605 or P1633 present? Yes No REPLACE the PCM. REPAIR other DTCs as necessary. If none, testing is complete. You may want to take this to the repair shop , do you own a volt ohm meter ? Do you know how to use one ?

Mar 14, 2015 | 2000 Ford Mustang

2 Answers

Starts great but motor trembles


As long as you're not pumping out white smoke from the tailpipe or losing coolant, then it's likely electrical.

First thing you can do, easiest also, is a visual inspection. Check for broken or cracked or disconnected spark plug wires.

There's many many many more tests you can do... if/when you're ready I can tell you a few more, and if you have tools for them.

Oct 06, 2014 | 2001 Ford Windstar

1 Answer

Troubleshooting an error code from 2000 ford focus. code P0135


P0133 - HO2S Sensor Circuit Slow Response (HO2S-11) The HEGO Monitor checks the HO2S Sensor frequency and amplitude. If during testing the frequency and amplitude were to fall below a calibrated limit, the test will fail. Contaminated HO2S sensor. This will cause the vehicle to fail emissions inspections, but is a fairly inexpensive repair.

Aug 05, 2010 | 2000 Ford Focus

1 Answer

Need fuse lay out for a 2000 ford windstar. milage


Go to a local library and check out the Chilton series for 2000 Ford Windstars.
Good luck... its a Ford.

Jun 16, 2010 | 2000 Ford Windstar

1 Answer

1999 ford windstar has a misfire code


Look at the coil pack, these are known to develop cracks, usually on the underside in the resin, you have to remove it to tell. It is much easier to reomve with the wiper cowl removed.

Apr 06, 2009 | 1999 Ford Windstar

1 Answer

I NEED TO KNOW WHAT CODE P1518 MEANS. I FAILED MY EMISSIONS TEST, AND THAT WAS THE CODE THAT IT GAVE. THE DEALERSHIPS WON'T TELL ME WHAT IT IS WITHOUT ME TAKING IT THERE & PAYING.


Just a suggestion. Take it to your local Advance Auto Parts store.They will give you a FREE diagnostics test. They can tell you the problem, cost, and code meaning. I hope you the best.

Aug 04, 2008 | 2000 Ford Windstar

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