Valeo J34P ECU Tuning
Engine control unit used in 7 supported models from 2 makes.
Citroen with the Valeo J34P
All Citroen tunes- Citroen C22006+1.4iAutoTuner
- Citroen C32003+1.4iAutoTuner
- Citroen C42005+1.4iAutoTuner
- Citroen Nemo2009+1.4iAutoTuner
Peugeot with the Valeo J34P
All Peugeot tunes- Peugeot 2061998+1.4iAutoTuner
- Peugeot 2072006+1.4iAutoTuner
- Peugeot 10072005+1.4iAutoTuner
About Valeo J34P tuning
The Valeo J34P engine control unit is supported in 7 models from Citroen, Peugeot. We read, modify, and flash it with AutoTuner, then verify the result on our Dynojet 424xLC2 in Jenison, MI. A custom calibration optimizes fueling, ignition timing, boost, and torque limits for your exact build.
Don't See Your Vehicle?
These lists cover off-the-shelf tuning platforms. We also do standalone ECU installs and custom calibrations, so reach out and we'll tell you what's possible for your build. Compatibility data last updated 2026-09-24.