I own a Ford Focus 1.6D 2013 manual car. 

 

Yesterday, I was kinda doing some preventative maintenance on the car and opened the throttle body to clean it, it's wiring, egr wiring, map sensor and cleaned it with some electrical fluid and put all of the connections back except for the egr connection which I forgot. I did not remove the EGR valve. Just is wiring. 

Later I accidentally turned the ignition on and the car failed to start. It said 'immobiliser active check handbook' when I tried to start the car. 

 

I removed the positive terminal of the battery for 40 mins hoping it would reset and start. No luck there.

So I was hoping to clear the faults using forscan. I just ran the forscan tool but I got more faults.

P0616 - starter relay A circuit low. This fault occurred on PCM seemed predominant and I couldn't reset the faults.. 

 I rechecked all the wiring I removed. It's all in proper shape. I noticed that the battery is not giving enough voltage. It's like when you try to start a car with a dead battery. That's the sound I get. Tik Tik Tik. I'm a beginner car guy and perhaps with the least knowledge here. Please help me get the car back to how it was.. 😩 Any help is much appreciated. There are 2 more faults which I couldn't attach due to size restrictions. 

So.........

The battery is flat !!

Using a smart charger, put the battery on charge for at least 12 hours. Leave the battery on the car and don't disconnect it.

Connect the positive charger lead to the battery positive terminal. Connect the negative charger lead to the chassis earth point, NOT to the battery terminal.

Switch on the charger and leave it for 12 hours. Then you can use FORScan and clear all the DTC's.

Switch off the charger (after using FORScan) and disconnect the charger. Start car as normal.

Quick point for future reference.

When working on a car battery ALWAYS disconnect the negative lead first. When refitting a battery always fit the negative lead last.

 

Thank you so much @unofix. I did jump start with another car and it started fine, left it on idle for 20 mins. I then cleared all the faults and it's all breezy again 😇😁 I was so worried looking at all those faults. Your suggestions and due diligence is much appreciated 😍

15 hours ago, unofix said:

Quick point for future reference.

When working on a car battery ALWAYS disconnect the negative lead first. When refitting a battery always fit the negative lead last.

 

On a side note, I noticed some residue of oil on the air box hose, it's linkage to turbocharger, intercooler hose and throttle body. It's like 3-5 ml in each of the aforementioned. The most I have noticed is in the air box hose. Is that all normal? It's my first car, so I insinuate when I see such stuff. Miraculously, there's no carbon deposits on throttle body. Heard the 1.6 tdci engines are notorious for carbon formation.. 

I wish to clean the egr valve next.. Dunno how much carbon deposits I would unveil 😕

3 hours ago, Abhi3 said:

I wish to clean the egr valve next..

When engines are running well and have no issues it is mostly very unwise to start taking things apart. If you booked your car in to a Ford main dealer for the most expensive major service they offered, it still would not include taking apart things like the EGR valve unless there was a problem.

Save your money (and time). You should think about replacing the timing belt as it is almost 10 years old and if that should snap then you can say goodbye to the engine. It should cost around £350

4 hours ago, unofix said:

When engines are running well and have no issues it is mostly very unwise to start taking things apart. If you booked your car in to a Ford main dealer for the most expensive major service they offered, it still would not include taking apart things like the EGR valve unless there was a problem.

Save your money (and time). You should think about replacing the timing belt as it is almost 10 years old and if that should snap then you can say goodbye to the engine. It should cost around £350

The car is very smooth and running as it's intended (got it tuned). The previous owner told both the timing belt and water pump were changed. Thought cleaning the egr and throttle body would help. I'll refrain myself from doing it anymore. Besides, the oil residue is the only slight worry as I don't know if it's normal..