Ford Focus 1.8TDCI: No Start, Blinking Spring Indicator, Errors P1631 & P2291, Pump & Injectors

Ford focus 1.8TDCI does not want to start, I attach a short video, the spring indicator blinks. After the diagnosis, errors P1 631 and P22 91 appeared. The injectors are regenerated, so is the pump.

Check the main relay and replace the fuel filter

Relay, efficient fuel filter, new still does not start

P1631 - Anti-theft Start Permission signal invalid
P2291 - Control pressure of the injectors; engine starting - pressure too low

Will it fire on the cake?

He will burn out what he gets, but he doesn't want to walk anyway.

Added after 3 [hours] 4 [minutes]:

And where is the 1.8 tdci fuel pump

Anyone ever had such a reason with firing ???

Hello
I have the impression that the voltage in the electrical system is too low and the ECU enters the diagnostic mode. Perhaps the pin code from the clocks to the immobilaizer ECU was incorrectly coded. Were the injectors coded after replacing them to the ECU? This error with the theft protection is in my opinion the fault of the immobilizer. Make a workaround and disable the immobilaizer. The pressure error in the system may be a leak or an electronic fault, so it is worth checking the fuel pressure solenoid valve on the high-pressure rail (resistance). Nominal values for these engines are from 170 to 200 bar for 16 tdci mk3 is already 250 bar. It is also worth checking the performance solenoid on the pump, its resistance.

robert977 wrote:

Make a workaround and disable the immobilaizer

Do you read this nonsense what you write?

robert977 wrote:

The nominal values for these engines are from 170 to 200 bar, for 16 tdci mk3 it is already 250 bar. It is also worth checking the performance solenoid on the pump, its resistance.

These too?
With all controls disconnected, this pump should reach 1700 bar on the starter.

janugrs wrote:

The injectors are regenerated, so is the pump.

But what did you do it yourself or know only from stories?
Secondly, if the fuel tank and the rest are not clean, you can have a repeat after a week.
Third, what the injector overflow test says.

The cost of repairing a pump is comparable to the cost of a car.

This pump below 2500 will not regenerate properly ...

Base for a well vented fuel system, flooded pump and filter.
Recently, the customer, after replacing the filter, burned out the entire cake and then somehow moved but only for a moment and they will be attracted by the rope.
After removing the pump and checking it on the table, it turned out that the pump was dead.

So, fill the pump with the filter and, preferably from the bulb, try to fire and check the pressure on the rail while shooting.

Hello
Admitting my mistake, the pressure on the rail in the comon rail is from 1300 to 1800 bar. The video shows how the controller communicated with the diagnostic scanner of individual modules (I mean the engine block, gearbox, immobilaizer, kilmy chip, etc.). Hence my suspicion of entering the diagnostic mode. Secondly, the lights on the board fade, which may indicate a low voltage in the installation, a weak battery, a worn starter.

It's Focus. In connection mode, the starter will not even turn off.

janugrs wrote:

Ford focus 1.8TDCI does not want to start, I attach a short video, the spring indicator blinks. After the diagnosis, errors P1 631 and P22 91 appeared. The injectors are regenerated, so is the pump.

In selected models of tdci engines there was a material defect in high pressure pumps, the material inside was peeling and the metal filings fell into the injectors. The reason may be faulty pressure solenoid valves in the cr strip, efficiency in the pump. It is worth checking the pressure and temperature sensor in the intake system, the air flow meter (I mean the resistance on the signal pin) is it worth doing the egr self-test is it working? crankshaft and check the resistance of the camshaft hall sensor, if there is voltage on the sensors. Does fuel appear on transfers. And the main question is whether there is compression on the cylinders and what are the values? Maybe the timing has shifted? worth checking out. It is enough for the ECU to collect the wrong signal from the sensor and the engine will not start.

Hello
In my 2002 Focus 1.8 TDCI the same problem occurred. A month ago, after firing 5 seconds, the engine went out. After restarting, I drove for three days, but the situation repeated and the engine did not start anymore. After connecting to the computer, two errors appeared: P1631 Main relay, Break and P2291. What is most interesting, the mechanic (probably by mistake cleaned the contacts of the green radiator fan relay and the car started to fire. I drove less than a month and the problems started. For a few days after starting on a cold engine, it went out, but it could somehow be fired again. Until today, when it went out and that's the end. It spins but does not start. Do you have any idea about this fault. Which is the main relay, because I can't find any pictures with description.