Description
Overview
The Bosch EDC15C2 Engine Control Unit (ECU) with part number 0281011518 (also referenced as 9658373180) is designed for PSA diesel applications. This ECU manages fuel injection, turbo boost, and engine timing for the 2.0 HDi diesel engine, delivering precise control for efficient combustion and emissions management. It is a commonly requested replacement unit for Citroën and Peugeot models in the PSA family and is frequently searched by its product codes.
Fitment And Application
Intended For: Citroën Xsara Picasso 2.0 HDi. Confirm compatibility by matching the vehicle VIN and existing ECU part numbers before installation. The unit may share cross-references with other PSA models; always verify exact part numbers (see Technical Information).
Function And Common Faults
Function: The ECU controls injection timing, diesel injection quantity, EGR operation and turbo management through sensor inputs. It also communicates with the immobiliser, ABS and other modules via CAN/bus systems.
Common Faults: Failures are typically caused by electrical issues such as water ingress, corroded connectors, wiring damage, heat-related component degradation or voltage spikes. Symptoms may include hard starting, reduced power, limp-home mode, intermittent stalling or diagnostic trouble codes related to fuel injection or immobiliser circuitry. Lifespan varies with vehicle use and environment; regular inspection of connectors and harnesses reduces risk of premature failure.
Replacement And Installation
Installation Notes: ECU replacement should be performed by a qualified technician or a competent DIY mechanic familiar with diesel systems and vehicle electronics.
- Disconnect the negative battery terminal before starting to prevent short circuits.
- Locate the ECU (position varies by model — check vehicle repair manual; commonly found in the engine compartment or behind the glovebox on PSA vehicles).
- Remove protective covers and unscrew mounting bolts, then carefully unplug all wiring harness connectors.
- Install the replacement ECU, secure mounting bolts and reconnect harnesses ensuring clean, tight connections. Refit covers.
- Reconnect the battery and clear any stored fault codes with a diagnostic tool. In many cases, ECU replacement requires coding or immobiliser synchronization using OEM-level diagnostic equipment to match the immobiliser and engine management data.
Tip: Inspect wiring and connector seals for damage or corrosion before fitting a new ECU; unresolved electrical faults can damage the replacement unit.
Technical Information
Manufacturer: Bosch
Model: Citroën Xsara Picasso 2.0 HDi
Product Codes: 0281011518 (EDC15C2)
Other Numbers: 9658373180, 1939EL, 1940Q1, 1940Q2
