DPF issues are common in diesel vehicles, including the 2004 Ford Focus C-Max. To resolve these issues, follow these steps:

1. Perform a Forced Regeneration: Drive the vehicle at a sustained speed of around 60 km/h (37 mph) for 20-30 minutes to allow the DPF to regenerate. This will help burn off the soot and clear the filter.
2. Check for DPF Fault Codes: Use an OBD-II scanner to identify any fault codes related to the DPF system. If codes are present, refer to our manual for detailed troubleshooting and repair instructions.
3. Inspect the Exhaust System: Ensure there are no leaks or blockages in the exhaust system that could affect DPF performance. Our manual provides a step-by-step guide on how to inspect and repair the exhaust system.

Our Workshop Service & Repair Manual offers detailed procedures for diagnosing and resolving DPF issues, ensuring your vehicle runs efficiently.

Turbocharger failure can lead to reduced engine power and efficiency. To address this problem, follow these steps:

1. Inspect for Turbocharger Leaks: Check the turbocharger for oil leaks, which are a common sign of failure. If leaks are found, our manual provides instructions on how to replace the turbocharger seals.
2. Test Turbocharger Operation: Use a boost gauge to test the turbocharger’s operation. If the boost pressure is below specification, refer to our manual for detailed testing and replacement procedures.
3. Clean or Replace the Turbocharger: If the turbocharger is clogged with carbon deposits, clean it according to the procedures in our manual. If cleaning does not resolve the issue, replacement may be necessary.

Our manual offers comprehensive guides on maintaining and repairing the turbocharger to keep your vehicle running at its best.

EGR valve problems can cause rough idling and reduced fuel efficiency. To fix this, follow these steps:

1. Remove the EGR Valve: Disconnect the electrical connector and remove the EGR valve from the engine. Our manual provides detailed diagrams and instructions for this process.
2. Clean the EGR Valve: Use a carburetor cleaner to remove carbon deposits from the EGR valve and the surrounding passages. Ensure all ports are clear of obstructions.
3. Reinstall and Test the EGR Valve: After cleaning, reinstall the EGR valve and reconnect the electrical connector. Start the engine and check for any improvement in performance.

Our Workshop Service & Repair Manual provides step-by-step guidance on EGR valve maintenance and repair to help you resolve these issues effectively.

Injector problems can lead to poor engine performance and fuel leaks. To address this, follow these steps:

1. Inspect the Injectors: Remove the injectors and inspect them for signs of wear or damage. Our manual provides detailed instructions on how to safely remove and inspect the injectors.
2. Clean or Replace the Injectors: If the injectors are clogged, clean them using an appropriate cleaner. If cleaning does not resolve the issue, replacement may be necessary, and our manual offers comprehensive replacement procedures.
3. Test the Fuel System: After cleaning or replacing the injectors, test the fuel system for leaks and proper operation. Our manual includes step-by-step testing procedures to ensure everything is functioning correctly.

The manual contains thorough instructions for diagnosing and repairing injector issues, helping to restore your vehicle’s performance.

Oil supply issues can cause sludge build-up, which may damage your engine. To resolve this, follow these steps:

1. Change the Oil and Filter: Drain the old oil and replace the oil filter. Refill with fresh oil of the recommended grade. Our manual provides detailed oil change instructions.
2. Clean the Oil Pickup Tube: If sludge has built up in the oil pickup tube, remove and clean it to ensure proper oil flow. Our manual offers step-by-step guidance on how to safely clean or replace the pickup tube.
3. Inspect the Oil Pump: If the oil pump is not functioning correctly, it could contribute to sludge build-up. Inspect the oil pump and replace it if necessary, following the instructions in our manual.

Our Workshop Service & Repair Manual provides all the necessary steps to prevent and resolve oil supply issues, ensuring your engine remains in top condition.