P1633 2009 Ford Fusion Code - Keep Alive Power Voltage Too Low
Quick Answer
The P1633 diagnostic trouble code (DTC) for a 2009 Ford Fusion indicates that the Keep Alive Power (KAP) voltage is too low. Common causes include Faulty wiring or connections in the KAP circuit, Weak or failing battery, Malfunctioning alternator. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1633 2009 Ford Fusion indicates Keep Alive Power Voltage Too Low .
- Common causes
- Common causes include Faulty wiring or connections in the KAP circuit, Weak or failing battery, Malfunctioning alternator.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1633 2009 Ford Fusion Description
The P1633 diagnostic trouble code (DTC) for a 2009 Ford Fusion indicates that the Keep Alive Power (KAP) voltage is too low. The Keep Alive Power is a constant voltage supply that maintains the memory of the vehicle's onboard computer system when the engine is turned off. This code typically points to an issue with the power supply to the vehicle's Engine Control Module (ECM) or Powertrain Control Module (PCM).
Common Causes of P1633 2009 Ford Fusion
- Faulty wiring or connections in the KAP circuit
- Weak or failing battery
- Malfunctioning alternator
- Defective ECM
- Corrosion or damage to electrical components
Symptoms of P1633 2009 Ford Fusion
- Rough idle or stalling
- Reduced fuel efficiency
- Engine misfires
- Illuminated Check Engine Light
- Loss of power or acceleration
How to Fix P1633 2009 Ford Fusion
- Begin by checking the battery voltage and ensuring it is within the manufacturer's specified range.
- Inspect the wiring and connections in the KAP circuit for any signs of damage, corrosion, or loose connections.
- Test the alternator output to verify that it is providing the correct voltage to the ECM.
- If necessary, replace the ECM with a new unit and reprogram it to the vehicle's specifications.
- Clear the DTC and perform a test drive to confirm that the issue has been resolved.
Cost to Fix P1633 2009 Ford Fusion
The cost of repairing a P1633 code on a 2009 Ford Fusion can vary depending on the specific cause of the issue. On average, the parts required for this repair, such as a new ECM or alternator, can range from $200 to $800. Labor costs at an auto repair shop typically range from $80 to $150 per hour, with the total repair time varying based on the complexity of the issue. Therefore, the total cost for resolving a P1633 code may range from $300 to $1500 or more, depending on the extent of the repairs needed. It is advisable to consult with a qualified mechanic or dealership for a more accurate cost estimate based on your vehicle's specific needs.
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Frequently Asked Questions about P1633 2009 Ford Fusion Code
1. What does the OBDII code P1633 mean on a 2009 Ford Fusion?
P1633 indicates that the Keep Alive Power (KAP) voltage is too low, meaning the vehicle's PCM (Powertrain Control Module) is not receiving sufficient voltage to retain memory when the engine is off.
2. What are the common symptoms of code P1633 in a 2009 Ford Fusion?
Common symptoms include the potential loss of saved settings (like radio presets or adaptive learning data), intermittent starting issues, or no noticeable symptoms at all.
3. What causes the P1633 code to appear in a 2009 Ford Fusion?
The code is typically caused by a disconnected or loose battery, a faulty PCM power circuit, a blown fuse, a weak battery, or corroded wiring or terminals.
4. Can I drive my 2009 Ford Fusion with a P1633 code?
Yes, the vehicle is usually drivable with this code, but it may experience minor issues like loss of adaptive settings or intermittent performance problems.
5. How do I fix the P1633 code on my 2009 Ford Fusion?
Inspect the battery connections and wiring, check the KAP fuse, ensure the battery is fully charged, and repair or replace any damaged components in the circuit.
6. Can a weak battery cause the P1633 code on a 2009 Ford Fusion?
Yes, a weak or failing battery can cause insufficient voltage to the PCM, triggering the P1633 code.
7. Where is the Keep Alive Power (KAP) circuit located on a 2009 Ford Fusion?
The KAP circuit typically involves a dedicated fuse and wiring connected to the PCM and battery, allowing it to retain memory when the engine is off.
8. How do I reset the P1633 code on a 2009 Ford Fusion?
After addressing the cause, clear the code using an OBDII scanner. If the issue is resolved, the code should not return.
9. Can a blown fuse cause the P1633 code in a 2009 Ford Fusion?
Yes, if the fuse supplying power to the PCM’s Keep Alive Memory (KAM) circuit is blown, it can trigger the P1633 code.
10. How much does it cost to repair a P1633 code on a 2009 Ford Fusion?
Repair costs vary depending on the cause, but common fixes like repairing connections or replacing a fuse are relatively inexpensive, ranging from $50 to $150.
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