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P1636 2007 Ford Fusion Code - Inductive Signature Chip Communication Error

Quick Answer

The P1636 diagnostic trouble code (DTC) for a 2007 Ford Fusion indicates an Inductive Signature Chip Communication Error. Common causes include Faulty inductive signature chip in the key fob, Wiring issues between the key fob and ECM, ECM malfunction. 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
P1636 2007 Ford Fusion indicates Inductive Signature Chip Communication Error.
Common causes
Common causes include Faulty inductive signature chip in the key fob, Wiring issues between the key fob and ECM, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P1636 2007 Ford Fusion Description

The P1636 diagnostic trouble code (DTC) for a 2007 Ford Fusion indicates an Inductive Signature Chip Communication Error. This code is related to the vehicle's immobilizer system, which is designed to prevent unauthorized access to the vehicle. The immobilizer system uses an inductive signature chip in the key fob to communicate with the vehicle's engine control module (ECM) and allow the engine to start. When the ECM detects a communication error with the inductive signature chip, it triggers the P1636 code.

OBDII Code P1636 2007 Ford Fusion - Inductive Signature Chip Communication Error
P1636 2007 Ford Fusion Code - Inductive Signature Chip Communication Error

Common Causes of P1636 2007 Ford Fusion

  1. Faulty inductive signature chip in the key fob
  2. Wiring issues between the key fob and ECM
  3. ECM malfunction
  4. Low battery in the key fob
  5. Interference from other electronic devices

Symptoms of P1636 2007 Ford Fusion

  1. Engine cranks but does not start
  2. Engine stalls while driving
  3. Immobilizer warning light on the dashboard
  4. Vehicle not responding to key fob commands

How to Fix P1636 2007 Ford Fusion

  1. Check the inductive signature chip in the key fob for damage or malfunction.
  2. Inspect the wiring between the key fob and ECM for any breaks or loose connections.
  3. Test the ECM for proper functioning and communication with the inductive signature chip.
  4. Replace the inductive signature chip or key fob if necessary.
  5. Clear the DTC and reprogram the ECM to recognize the new inductive signature chip.

Cost to Fix P1636 2007 Ford Fusion

The typical repair costs for addressing a P1636 code on a 2007 Ford Fusion can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops may offer lower prices. For a more accurate estimate, it is recommended to consult with local auto repair shops.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1636 2007 Ford Fusion Code

1. What does the OBDII code P1636 mean on a 2007 Ford Fusion?

P1636 indicates an Inductive Signature Chip (ISC) Communication Error, meaning the PCM is having trouble communicating with the ISC module.

2. What are the common symptoms of code P1636 in a Ford Fusion?

Symptoms may include a check engine light, erratic engine performance, difficulty starting, or reduced power.

3. What causes the P1636 error code to appear?

Common causes include a faulty inductive signature chip, damaged wiring or connectors, or a malfunctioning PCM.

4. Can a bad battery cause the P1636 code in a 2007 Ford Fusion?

Yes, low voltage or a weak battery can interfere with communication between the ISC and PCM, potentially triggering this code.

5. How do I diagnose the P1636 code in my Ford Fusion?

Start by inspecting the wiring and connectors between the ISC and PCM, checking for damage, corrosion, or loose connections. Use a scan tool to verify communication signals.

6. Is the P1636 code serious for my 2007 Ford Fusion?

While the vehicle may still run, ignoring this code can lead to more severe engine performance issues and potential drivability problems.

7. How do I fix a P1636 error code on my Ford Fusion?

Repairs may include replacing a damaged ISC module, repairing faulty wiring, or reprogramming or replacing the PCM if necessary.

8. Can I clear the P1636 code without fixing the issue?

You can clear the code with a scan tool, but it will likely return if the underlying issue isn’t resolved.

9. How much does it cost to repair a P1636 error on a Ford Fusion?

Costs vary depending on the issue. Wiring repairs may cost $50-$200, while replacing the ISC module or PCM can range from $300 to $1,000.

10. Can I drive my 2007 Ford Fusion with the P1636 code?

It’s possible to drive with this code, but it’s not recommended as it may lead to performance issues or further damage over time.

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