We test these Peugeot 207 engine ECUs on our purpose built Hardware In-the-Loop test rigs. (the above numbers are just a small list of common failing part numbers, if you do not see your part number then please see our full list here) P0014 – Exhaust Camshaft Dephasing Fault Coherence.P2237 – Oxygen Sensor Positive Current Control Circuit.P0037 – Oxygen O2 Sensor Heater Control Circuit Low – (Bank 1, Sensor 1).P0958 – Controlled Thermostat Control – Short Circuit To Earth.P0141 – Oxygen Sensor Heater Circuit Malfunction – (Bank 1, Sensor 2).P0031 – Oxygen Sensor Heater Control Circuit Low – (Bank 1, Sensor 1).P0135 – Oxygen Sensor Heater Malfunction – (Bank1, Sensor 1).P0599 – Thermostat Heater Control Circuit – Short Circuit To Positive.We have also seen failure of this ECU to cause engine misfires and sporadic fault codes for various engine sensors. We see a lot of these 207 ECUs failing, causing the 'anti pollution fault' message to be displayed, failure of the coolant temperature sensor/gauge, with a constant overheat warning light on the dashboard, this will also cause the coolant fan to run constantly and may cause engine idling problems, also fault codes stored for the thermostat heater control.Īnother common symptom of ECU failure is MOT emissions failure caused by a non-functioning lambda sensor circuit, if this occurs then you will likely have fault codes stored for the oxygen 02 sensor. This Peugeot 207 ECU is a very common failing unit that affects vehicles built between 20 with the standard 1.4 and 1.6 litre engines and also the higher powered VTi and GT CC versions.

Abs fault pezo 206