2008 Jeep Grand Cherokee Front Differential Control Circuit


A customer rang us recently and asked us to investigate a fault on his 2008 Jeep Grand Cherokee, he reported a warning message directly after starting the engine indicating a 4 wheel drive malfunction. I began by carrying out a diagnostic check of the 4WD module, I retrieved one static error code namely C1417 – Front Differential Control Circuit Low. This error code relates to the front differential lock control solenoid circuit. An hypoid bevel differential will by design transmit torque through the path of least resistance therefore if traction is lost on one wheel all the traction on that axle will be lost, which of course is not desirable on an off road vehicle. To prevent this on this …

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2008 VW Touareg AC Fault

Touareg Sensor 1K0907543A

It is unusual to be asked to investigate an A.C. (Air Conditioning) fault in the middle of November but that is exactly what happened recently. The vehicle was a 2008 Volkswagen Touareg which had been recently purchased by the customer who had then noticed that the A.C. was inoperative, I was asked by the selling dealer to fix the problem. The job was allocated to my son Scott who began by checking the refrigerant static pressure, this is done by connecting manifold gauges to the A.C. high and low pressure connectors, because the vehicle is equipped with a low pressure cut-out switch we needed to establish that the static pressure was sufficient. As the pressure equalises when dormant you would …

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2005 Peugeot 307 Diesel – Loss of Power

2005 Peugeot 307 Diesel Turbo Wastegate Position Sensor

I was recently asked to investigate an intermittent loss of power on a 2005 Peugeot 307 diesel accompanied by MIL illumination. This was a new customer so there was the potential that the vehicle had possibly been looked at elsewhere, it is not unusual for us to be asked to look at vehicles that have visited numerous garages first. Upon driving the car into the workshop I noticed the engine malfunction light was illuminated and that there appeared to be a lack of boost pressure. A visual inspection in and around the engine bay confirmed my suspicions as I noticed numerous new parts had been recently installed. I began with a diagnostic check using our Peugeot Planet diagnostic tool which …

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