Told ecu fried. Can't start.
2002 Peugeot 406 2l hdi lx estate

1 points

Problem added: Sep 27, 2017 (3 years ago)
Had ecu read by several devices bur nothing is coming up. Engine light has been on a long time. Have tried about 5 times now to see what the brain of this car says. ..Won't fire when starting...had various diagnoses such as fuel pump and crank sensor which have been changed etc. Yes have bled pump thru. If I buy an ecu ... how do I go about changing it? Is it as simple as plug and play?

Car details
Car: Peugeot 406
Variant: 2l hdi lx estate
Model Year: 2002
Category: Electrics, ECU, Warnings & Lights
Replies and Fixes
1,892 points

Sep 27, 2017 (3 years ago)
No they're coded.
Get someone capable to check the power and grounds on the ECU.
If there's a fault in the wiring then the ECU won't power up.
So there'd be no communication with any diagnostic device.
On a brighter note the engine management light is controlled by the ECU so it's clearly part working.
Get the three letter from the vin number and I'll post which terminal to test,
Your looking for RHS OR RHY RHZ.
1,786 points

Sep 28, 2017 (3 years ago)
when you say nothing comes up do you mean you cannot access any systems at all i.e communicate with the vehicle

This problem is archived

If you're having a similar problem please click below to re-post this problem, you can then customise it to suit your situation.

Options for fixing the problem

Fix the problem yourself

If you need parts to do the job head over to Euro Car Parts to find the parts you need.

  • Free UK Delivery
  • 365 Day Returns
  • Free Click and Collect
Find a Local Mechanic

Use our AutoInsider Find A Specialist search, find garages and mobile mechanics near you.

Simply enter your postcode, select the required specialist areas and view your results.

Having a problem with your Peugeot 406?

Tell us about your 406 problem

On Social Media