Hi, i have a problem with my ford escape 2001, check engine with code p1633, what are the cause tank you

P1633 - Keep Alive Power (KAPWR) Voltage Too Low Description: Indicates the KAPWR circuit has experienced a voltage interrupt. Possible Causes:

• Open KAPWR circuit
• Intermittent KAPWR

Diagnostic Aids: Loss of KAPWR to the powertrain control module (PCM) results in immediate malfunction indicator lamp (MIL) illumination and DTC P1633. Application Key On Engine Off Key On Engine Running Continuous Memory All GO to Pinpoint Test QB .
QB: DTCs P0603 or P1633: Keep Alive Power (KAPWR)
Introduction QB: Pinpoint Tests This pinpoint test is intended to diagnose the following:

• battery terminal condition
• KAPWR wire routing
• harness circuit: KAPWR
• powertrain control module (PCM) (12A650)

Powertrain Control Module (PCM) Connector

For PCM connector views or reference values, refer to Section 6 .


Vehicle Connector Pin Circuit Edge,
F-150,
Five Hundred,
Freestyle,
Mark LT,
MKX,
Montego 190 Pin B54 KAPWR Escape/Mariner,
Focus 150 (50-50-50) Pin B45 KAPWR Expedition,
Fusion,
Milan,
MKZ,
Navigator 140 Pin B54 KAPWR All other vehicles 170 Pin B45 KAPWR
Do you know how to test automotive electrical circuit's using a DMM - digital multi- meter ?

p1633 accelerator pedal position sensor 2 signal too low,

throttle position sensor

List Throttle Position Sensor 2005 Ford Escape Reilly Auto Parts

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?

P1633 means the battery was disconnected or became discharged enough to be unable to keep the battery-backed memory in the control module alive.

If the alternator is failing intermittently, it may not always keep the battery charged enough to properly run the engine, which could cause misfires. Ensure the battery and its terminal connections are in good shape.

I am trying to connect the two facts you listed. Your facts may not be enough to find the actual cause of the misfire, however. Certainly a disconnected or otherwise discharged battery will cause the P1633 code.

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

Read more: http://www.engine-codes.com/p1633.html

This code means the pcm has detected a low voltage situation on the memory circuit this is a common problem in fords start by disconnecting the battery then with electrical contact cleaner pull the fuses one at a time from the fuse box under the hood clean the contacts coat with dielectric grease and replace them usually it is caused by corrosion of the contacts in this box however I have run across this where the actual wire for the memory itself has corroded to the point where it needs to be replaced from the fuse all the way to the pcm itself

Probably nothing.
The code means the gas tank can not be sealed to prevent vapors from escaping.
Common causes are a missing gas cap when the engine is running, or a faulty hose from the tank to the vapor canister.

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

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.

Hello! Both faults are pointing at the same Oxygen Sensor...Upstream Bank 2...Meaning in the exhaust header before the Cat. converter on the right side of the engine...O2 sensors generally cause a P-code as an effect rather than a cause...But in this instance it's a defective O2 Sensor...Replace...

Guru.....Saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

P1633 means KAM (keep alive memory) power is low. The power that goes to the vehicles computer to hold its memory when the key is off has lost its power. I would start by checking fuses in the fuse panel in the engine compartment(near the radiator support). If the fuses are all good then I would test for power at the computer connector which is also in the engine compartment behind the engine. I don't have the pin number or wire color at the moment (I apologize) since the Ford website is down at the moment. I have repaired this problem in the past by installing another power wire to feed the circuit essentially bypassing the original circuit.
Hope this helps