135 posts · Joined 2016. #8 · Jan 28, 2020. ~ 580 for the sensor, rest for the short moment it took them to verify the fault, change the sensor and clear codes. It is now fixed. Have about 2000km on the new and all seem to be well. It is (mostly) extremely easy to work on this car. 100Hdi manual -15. J. As a car aficionado it was really nice to come across AlfaOBD. It's a terrific and informative app that has a pretty comprehensive collection of information for many cars. I've always been a Citroen car enthusiast so it was really a nice surprise to have good information and software diagnosis on Citroen. It also covers from Alfa Romeo to Dodge. A forum community dedicated to Citroen C4 Cactus crossover owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! Full Forum Listing Poor acceleration. The most obvious sign of clogged catalytic converter in Citroen C4 is slow acceleration or degraded engine performance. When you press the gas pedal from a stopped position, the vehicle may accelerate normally initially. But after reaching a certain speed, the performance of the engine will drop due to blockage of increasing 313 posts · Joined 2015. #2 · Jul 13, 2017. Hello and welcome to the forum..the Citroen connect dongle, afaik, refers to the internet options which doesn't work. The Sat Nav is only available on the Flair variant and is activated by pushing the last button on the left hand side of the main screen..after that all should be come clear😀. I have a Citroen Cactus C4 Diesel. The warning signs Urea+ service + a picture of the engine came up. I took the car to the local Citroen dealer in France-am on holiday! He refilled the adblue system. All the lights went off and all appeared well. That was four days ago. The U029E code is related to the reductant system in an automobile. The system uses two NOx sensors to monitor the amount of NOx in the engine’s exhaust gas. The second NOx sensor is located between the SCR and the DPF and monitors NOx levels downstream of the SCR. The ECM sets a DTC when a serial data message is received from the NOx sensor Wheels and tyres. Lubricants & fluids. Engine. Cooling system. Brakes. Transmission. Air conditioning. Haynes guides are your go-to for Citroen C4 CACTUS. Achieve maintenance mastery with our clear-cut instructions and DIY support for models since since 2014. TahK.