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Old 28-05-19, 02:16 PM   #1
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Default 307 CC 2005 2ltr petrol injector fault ?

Hello All

Have the following issue, vehicle runs fine for 20 mins, then appears to run lumpy i.e. running on 3 cylinders, especially under load. Have the following fault code

[MM48P/MM6LP]: Injector Supply Signal 4 Open Circuit.
[MM4MP2]: Cylinder no.3 Injector Control. Open Circuit. Intermittent Fault

Cylinder Reference Sensor 1. Coherence Intermittent Fault

Have cleared the fault codes but fault returns.

Checked all the injectors impedance/resistance they measure fine and have replaced, injector 4, which is the one on the far right as you look at the engine from the front, fault still the same.

Any ideas?
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Old 28-05-19, 02:46 PM   #2
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Hi..have a search on here for cylinder numbers?I have for you and found a quote from a member "Standing facing your Engine they are numbered 4 3 2 1" you may have changed the wrong injector....fun of french cars......
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Old 28-05-19, 03:54 PM   #3
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french number engines backwards so 4 is nearest crank pulley BUT your fault codes are not saying injector is faulty it is saying its open circuit so it is more likely bad wiring.

Cam sensor coherence is the signal not being what ecu expects again could be wiring.
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