P0603 – Common Peugeot Boxer, Fiat Ducato & Citroen Relay ECU Fault
Do you have a non-starting 2.2L HDi Peugeot Boxer with a P0603 DTC? These symptoms are the hallmarks of a widespread DCU-102 engine ECU fault. Send us yours for testing and we’ll restore functionality in just 2-3 working days with a lifetime warranty included.
Shop Now - Peugeot Boxer P0603 Solution
The Visteon DCU-102 is fitted to 2.2L (HDi/Multijet) Peugeot Boxers, Fiat Ducatos and Citroen Relays made between 2007-2014, and failure frequently causes P0603 to store. It’s also common for affected vehicles to experience rough running, cutting out and non-start.
If you’re experiencing any of these issues and suspect your Peugeot Boxer’s ECU is the cause of P0603, send the control module to us for testing.
P0603 Peugeot Boxer fault explained
As mentioned, a faulty DCU-102 is a common cause of problems in Peugeot Boxer vehicles, while starting issues and engine lights can be caused by a variety of faults, one DTC in particular points towards the engine ECU:
- P0603 - Internal Control Module Keep Alive Memory (KAM) Error
KAM relates to ‘keep alive memory’. In normal operating conditions, when the ignition is switched off and the main ECU circuits shut down, a small part of the control module’s memory remains powered. This is KAM, and it’s used to store a variety of information, typically related to the individual operating characteristics of the vehicle.
However, when the DCU-102 develops an internal malfunction, this area of the control module is very often affected, causing KAM data to be lost or corrupted.
The next time the key is turned in the ignition barrel, the engine ECU is prompted to verify its own internal integrity upon start-up. One of the ECU’s self-tests relates to KAM, which of course fails due to the DCU-102’s internal defect. As a result of the failed KAM checksum, the ECU stores a P0603 DTC.
How to resolve the P0603 Peugeot Boxer fault
Having diagnosed their P0603 DTC as a consequence of a defective DCU-102, many Boxer, Ducato and Relay owners choose to purchase a brand-new one from Peugeot, Fiat or Citroen. However, this isn’t the most effective solution as it often leaves owners vulnerable to the very same issue.
What many don’t appreciate is that these engine ECUs are known to fail as a result of internal component degradation. Therefore, simply re-installing like-for-like components runs the risk that failure will reoccur and P0603 will return to your Peugeot Boxer before long.
Fortunately, we’ve developed a much longer-lasting solution: a comprehensive remanufacture of your DCU-102 ECU.
Our solution
We test these control modules on custom-developed hardware-in-the-loop testing rigs. By examining unit performance under realistic loads and operating conditions, we’re able to pinpoint the root cause of your Peugeot Boxer’s P0603 DTC.
Once we’ve confirmed the fault, our team of expert technicians will remanufacture your control module using components of a higher standard than OEM. Fortunately, our process preserves all programming information, meaning you’ll be able to refit the ECU as soon as you receive it back from us.
We’ll carry this out within 2-3 working days and we’ll cover you with an unlimited-mileage lifetime warranty too. Resolve your Peugeot Boxer’s P0603 DTC for good, have your ECU rebuilt by us.
Common failure symptoms:
- Engine light on
- Cutting out
- Non-start
- No communication with engine ECU
Common fault codes:
- P0603 - Internal Control Module Keep Alive Memory (KAM) Error
- P0200 - Injector Circuit Malfunction
- P062B - Internal Control Module Fuel Injector Control Performance
- P0251 - Injection Pump Fuel Metering Control “A” Range/Performance
- P2148 - Fuel Injector Group “A” Supply Voltage Circuit High
Test and rebuild:
We analyse all control modules on state-of-the-art testing rigs before and after the rebuild process. This ensures long-lasting functionality is restored and the ECU is ready for the road.
Programming:
You won’t need to have the rebuilt ECU recoded to your vehicle at additional time and expense. This information is preserved throughout the process so that your control module will be plug-and-play when you receive it back.
Quality:
We strive to provide the highest quality service possible, which is demonstrated by our proud defect rate of just 0.49%. This is just one of the reasons we’ve become the trusted provider of automotive remanufacturing services for thousands of industry specialists worldwide.
Warranty:
Lifetime unlimited mileage*
How do I get my unit rebuilt?
To pay for the rebuild click the Shop Now link above, select your part number and click: Get yours rebuilt.
Print the payment/booking confirmation email.
Package the engine ECU inside a sturdy box with plenty of packaging material and make sure you include your confirmation email in the box.
Send us your package by tracked courier (the shipping instructions are on the confirmation email).
Once received we will test, rebuild and return your control module with an unlimited mileage lifetime warranty. If your unit turns out not to be faulty then we will refund your payment less a small testing fee and return shipping.
What if I don’t want to pay up front?
This is not a problem, if you prefer this option then follow these steps:
Fill in and submit this test form.
Print the booking confirmation email.
Package the DCU-102 inside a sturdy box with plenty of packaging material and make sure you include your confirmation email in the box.
Send us your package by tracked courier (the shipping instructions are on the confirmation email).
Once received, we will test your ECU and call to inform you of the outcome of testing. If your unit is faulty and you choose to go ahead with the rebuild, then we will take payment over the phone using a debit/credit card.
We will then rebuild your control module and return it to you with an unlimited mileage warranty.
If you require further information regarding this P0603 Peugeot Boxer fault then please contact us.