Complete Guide to Ford Galaxy Fault Codes (UK) – What Those Lights Really Mean!

If you’ve ever had that dreaded “check engine” light pop up on your Ford Galaxy MPV, you’re not alone. Whether you’re cruising through Birmingham or navigating the M25, the last thing you need is an engine warning that leaves you guessing. That’s where this comprehensive list of Ford Galaxy fault codes comes in.

We’ve put together a no-nonsense, human-friendly guide to help you decode what your car is really trying to tell you—without jargon or endless Google searches. Whether it’s a misfire, a dodgy sensor, or a mysterious module communication issue, you’ll find it right here.

Ideal for mechanics, enthusiasts, or everyday drivers in the UK who just want answers.

🔧 What Are OBD-II Fault Codes?

Modern vehicles like the Ford Galaxy use an On-Board Diagnostics system (OBD-II) to monitor the health of the engine, transmission, emissions system, and more. When something goes wrong, your car logs a Diagnostic Trouble Code (DTC)—a five-character code that starts with a letter (P, B, C, or U).

Let’s break them down:

⚙️ Powertrain Codes (P-Codes)

These start with P and are the most common. They relate to the engine, fuel system, ignition, transmission, and emissions.

Common Categories:

• P0100–P0199: Air/fuel metering and sensors
  Examples: MAF sensor faults, intake air temperature errors

• P0200–P0299: Fuel injection and turbocharger issues
  Examples: Injector misfires, boost pressure problems

• P0300–P0399: Ignition and misfire detection
  Common code: P0300 – random cylinder misfire

• P0400–P0499: Exhaust and emissions
  Common codes:

  • P0420 / P0430 – Catalyst efficiency below threshold

  • P0440 – P0455 – EVAP system leaks (often just a loose fuel cap)

  • P0489 – EGR valve/control circuit low

• P0500–P0599: Vehicle speed and idle control
  Common code: P0500 – vehicle speed sensor malfunction

• P0600–P0699: Computer output signals
  Examples: PCM communication errors or logic faults

• P0700–P0899: Transmission control faults
  Examples: Shift solenoid faults, turbine speed sensor errors

🏭 Manufacturer-Specific Codes (P1xxx)

These are unique to Ford and often cover additional engine management features, EGR systems, fuel metering, turbo boost control, etc.

Common Ford-Specific Codes:

• P1100–P1104: MAF sensor range and performance

• P1109–P1115: Intake air temp or sensor short circuits

• P1116–P1119: Coolant and manifold temp issues

• P1120–P1125: Throttle position sensor range issues

• P1406–P1411: EGR sensor and valve faults

• P1474 / P1479: Fan control and AC relay problems

• P1500–P1525: Idle control and intake runner valve issues

• P2000: NOx trap efficiency fault (common on diesels)

• P0258: Fuel metering control (especially in EcoBoost or diesel models)

📡 Network Communication Codes (U-Codes)

These codes start with U and refer to issues in communication between the vehicle’s many control modules (like ABS, BCM, PCM, etc.).

Common U-Codes:

• U0155: Lost communication with instrument cluster

• U0402: Invalid data received from TCM (Transmission Control Module)

• U0415 / U0422: CAN bus faults between modules (often appear with ABS/traction faults)

These are particularly common when there’s a low battery, a loose ground, or intermittent wiring problems.

🚗 Body System Codes (B-Codes)

These start with B and involve the car’s body systems, such as:

• Airbags

• Climate control

• Central locking

• Instrument panel faults

They’re less likely to cause drivability issues but may impact comfort or safety.

🛞 Chassis Codes (C-Codes)

Starting with C, these relate to:

• ABS

• Power steering

• Suspension systems

• Brake pressure sensors

Common C-codes can come up after pothole damage, sensor wear, or brake fluid issues.

🔥 Top 10 Most Frequent Ford Galaxy Fault Codes (UK Models)

Here are the codes most often reported by UK Galaxy drivers and garages:

1. P0258 – Fuel metering control low

2. P0420 – Catalyst system efficiency below threshold

3. P2000 – NOx trap efficiency (diesel models)

4. P0489 – EGR system fault

5. P0300 – Random misfire detected

6. U0155 – Lost communication with instrument cluster

7. P0442 – Small EVAP leak

8. P0500 – Vehicle speed sensor malfunction

9. P1409 – EGR vacuum regulator fault

10. P0606 – PCM processor fault

🧠 How to Use These Codes Effectively

1. Plug an OBD-II scanner into the diagnostic port (under the dash near the pedals).

2. Make a note of all codes displayed.

3. Refer to this guide to understand what each code means.

4. Use live data from your scanner to check sensor performance.

5. Reset the codes and test-drive—see which ones return.

✅ Final Word: Don’t Panic—Decode It!

The Ford Galaxy is a practical and reliable MPV, but like any modern car, it comes with complex electronics. Understanding these fault codes puts you in control and could save you hundreds on diagnostics. Whether you’re a hands-on DIYer or just want to know what your garage is talking about, this list will help you stay informed and proactive.