What Are the Most Common Problems with the Ford Transit Custom?
The Ford Transit Custom has set a high standard in the medium-sized van market since its 2012 launch, earning accolades for its driveability, design, and overall utility. It's a top choice for professionals and fleets across Europe. However, no vehicle is without its flaws, and the Transit Custom has developed a reputation for several recurring issues. This guide details the most common reliability problems reported by owners and mechanics for all diesel-powered versions.
Which Problems Affect the Newest Transit Custom MK3 (2023-Present)?
The latest generation of the Transit Custom features a completely new platform, advanced driver-assist technologies, and the latest Euro 6d diesel engines. While still new, initial reports from the field have highlighted some early-life issues, particularly with its sophisticated electronics and emissions systems.
SCR / AdBlue System Malfunctions
- Symptom: Owners often see a "Check emissions system" warning on the dashboard, which can be followed by a countdown that will prevent the engine from starting.
- Cause: This is a common issue on many modern diesels. Failures can be attributed to faulty NOx sensors, a pump/heater unit failure in the AdBlue tank, or a crystallized AdBlue injector. Cold weather can exacerbate these problems.
- Fix: The solution requires replacing the specific faulty component and performing a system reset with diagnostic tools. Using high-quality, fresh AdBlue is recommended.
Infotainment and Electrical Glitches
- Symptom: The central infotainment screen may freeze or go blank, or driver assistance systems might issue false alerts.
- Cause: These are often software bugs that are typical in early-production vehicles. Poor grounding of electronic modules can also cause unpredictable behavior.
- Fix: The primary solution is to have a Ford dealer apply the latest software updates. Checking major ground connections can also resolve some issues.
Carryover Wet Timing Belt Concerns (2.0 EcoBlue)
- Symptom: This is a preventative maintenance concern rather than a direct symptom. Failure is catastrophic and often without warning, but debris from a degrading belt can sometimes be seen in the oil.
- Cause: The MK3 model continues to use the 2.0 EcoBlue "belt-in-oil" design. This belt is known to degrade if incorrect oil is used or if service intervals are stretched.
- Fix: Strict adherence to oil change schedules using Ford's specified oil (WSS-M2C952-A1) is critical. The belt must be replaced no later than the 10-year/144,000-mile interval.
What Are the Common Issues on a Transit Custom MK2 (2018-2023)?
The MK2 Transit Custom is largely defined by the introduction of the 2.0 EcoBlue diesel engine. While offering better performance and emissions, this engine brought with it one of the model's most significant and well-documented reliability concerns: the wet timing belt.
Wet Timing Belt Degradation (2.0 EcoBlue)
- Symptom: The first sign of a problem may be a low oil pressure warning light, an unusual engine rattle, or, in the worst case, sudden engine failure.
- Cause: The "belt-in-oil" design is highly sensitive to oil quality and condition. Fuel dilution of the oil (from DPF regeneration cycles) or using non-specified oil can cause the belt material to break down prematurely.
- Fix: This is a critical service item. The belt and its associated oil pump belt must be replaced at or before the recommended interval (144,000 miles or 10 years). Using the correct Ford-spec oil is non-negotiable for longevity.
EGR Valve and Cooler Clogging
- Symptom: A clogged EGR system will cause a rough idle, engine hesitation, black smoke during acceleration, and an illuminated engine management light.
- Cause: Soot and carbon deposits build up in the EGR valve and intake manifold, a problem made worse by frequent short-distance driving where the engine doesn't reach optimal temperature.
- Fix: The EGR valve often needs to be replaced. For a complete repair, the intake manifold should also be removed and professionally cleaned to remove all deposits.
Turbocharger Actuator Failure
- Symptom: The van will feel sluggish with a noticeable lack of power and inconsistent turbo boost. It will often trigger "Turbo Underboost" or similar fault codes.
- Cause: The electronic actuator that controls the turbo's variable vanes is a known weak point. The vanes themselves can also get stuck with carbon.
- Fix: The actuator can sometimes be replaced separately, but often the entire turbocharger assembly needs to be replaced.
What Faults Affect the First-Generation Transit Custom MK1 (2012-2018)?
The original Transit Custom was a game-changer in the van market. However, early models, in particular, have several known weaknesses that have become apparent over a decade of use.
Turbocharger Failure
- Symptom: A sudden and complete loss of engine power, often putting the van into "limp mode," accompanied by a loud whining or siren-like noise from the engine bay.
- Cause: The primary cause is often oil starvation to the turbo's bearings, which can be due to extended service intervals or a blocked oil feed pipe. The VNT mechanism can also fail.
- Fix: A replacement turbocharger is required. It is critical that the oil feed and return lines are also replaced to ensure the new unit is properly lubricated.
DPF System Blockage
- Symptom: The DPF warning light will illuminate on the dashboard, and engine power will be severely restricted. You may also notice the engine cooling fan running at high speed after shutting the van off.
- Cause: The Diesel Particulate Filter (DPF) becomes saturated with soot, typically because the van is used for too many short journeys, preventing the automatic cleaning (regeneration) process from completing.
- Fix: A workshop can perform a "forced regeneration" with diagnostic tools. If the blockage is too severe, the DPF will need to be professionally cleaned or replaced.
Accelerator Pedal Wiring Issues
- Symptom: The engine fails to respond when the accelerator pedal is pressed, leaving the van stuck at idle speed.
- Cause: This is a well-known fault caused by the wiring loom to the throttle position sensor rubbing against a nearby bracket, eventually causing the wires to break.
- Fix: The damaged section of the wiring needs to be repaired or replaced, and the loom must be re-routed or secured to prevent it from rubbing in the future.
Manual Gearbox Problems
- Symptom: Difficulty selecting gears, particularly 1st and 2nd, a "crunching" sound during changes, or the van jumping out of gear.
- Cause: This is due to premature wear of the synchronizer rings and internal bearings within the 6-speed manual transmission.
- Fix: The only permanent solution is to have the gearbox rebuilt with new synchros and bearings. Regular gearbox oil changes can help mitigate wear.
Why Using Quality Parts is Crucial:
When addressing any of these common issues, from a timing belt kit to a turbocharger, using high-quality OE or reputable aftermarket parts is essential. Investing in reliable components minimizes the risk of repeat failures and ensures your Transit Custom remains a dependable vehicle.
Disclaimer:
- This guide highlights common reliability issues reported for the Ford Transit Custom. The actual occurrence and severity of faults can vary depending on the vehicle's specific maintenance history, age, and usage patterns. A professional diagnosis from a qualified mechanic is always recommended.
|
