As for your P1434 Error:
Description of the fault code: Particle filter additive system: Excessive temperature or open circuit. The circuit is open for 1 second.
Conditions for fault activation: When the pump is trying to be activated, and the battery voltage is more than 7V and there is no error on BUS internal to the engine management ECU.
Down-grade modes if fault present: Deactivation of the particle emission filter additive pump, stopping of the cumulative calculation of the quantity of additive to be injected and switching on of the warning lamp and/or warning message.
Suspect areas: Additive pump
Consider the following:
The additive pipe may be blocked or there could be an internal issue, or an electrical short.
Do you know when the last time the additive fluid was topped up? If it has been topped up, was the additive ECU also reset to zero? There is no physical measuring system used in the additive pump system. The additive fluid remaining is estimated and is calculated from original amount in the tank against mileage travelled and the amount injected. There is one possibility I can think of and that is if the additive counter has been reset without the additive tank being topped up, then the system will think there is adequate fluid when the tank could be near empty. This could lead to problems with the pump possibly overheating. This scenario would soon lead to filter clogging and a warning would ensue on the dashboard warning about risk of clogging. It's just a theory. But these are the checking procedures to phsically measure the level:
In order to physically check the level, you would have to remove the additive reservoir and check the amount of fluid recovered from the tank. The following should be the quantities based on mileage for the DW10BTED4 engine:
| Distance Travelled Miles | Distance Travelled KM | Quantity of additive taken from the tank in litres |
| Kilometres | Miles | DW10BTED4 |
| 0 | 0 | 2,9 + 0,2 |
| 30 000 | 18 750 | 2,25 + 0,2 |
| 60 000 | 37 500 | 1,6 + 0,2 |
| 90 000 | 56 250 | 0,95 + 0,2 |
| 120 000 | 75 000 | 0,3 + 0,2 |
Once reassembled you would need to use Lexia to Perform the actuator test "filling of tube: additive pump - additive injector" to prime the circuit.
To check the circuit itself (whether the additive pump is being controlled or not):
You'll need a plug kit and a vacuum pump with the right adapters:
| |
| Manual vacuum pump DA16 with adaptors | Plug Kit |
|
(1) Additive injector (Fuel pump gauge module ).
(2) Anti-return valve (According to equipment).
(3) Additive supply pipe.
(4) Additive pump (Additive tank). |
Using Lexia, carry out the "actuating the additive pump" actuator test. This is an audible test to ensure that the additive pump is controlled.
| Check | Noise and sensation of vibration when the additive pump is operating | No noise or sensation of vibration when the additive pump is operating |
| Finding | The additive pump is controlled | The additive pump is faulty or the power supply is cut |
| Action | Continue the checking | Repair the additive pump or restore the power supply
Continue the checking |
Visually check the condition of the additive supply pipe (3), looking for traces of additive leaks. Replace the additive supply pipe (3) if necessary.
- Plug the additive pump using tool the plug kit [0188-T].
- Connect the tool [01101] to the additive supply pipe (3) (Additive tank end) using a click-on pipe that guarantees the assembly is leak free.
- Activate, using pressure, the manual pump [01101].
| Check | Pressure lower than or equal to 400 mbars | Pressure higher than 400 mbars |
| Observation | The additive injector and the additive supply pipe are not blocked | The additive injector is jammed
or
The additive supply tube is blocked |
| Action | Condition correct
End of check | Condition not correct
Continue the checking |
Remove tools [01101] and [0188-T].
Couple the additive supply tube (3) to the fuel pump gauge module (5) and to the additive pump (4).
Carry out the actuator test "filling of the pipe: additive pump - additive injector" (According to specification) using a Lexia.
Part No 1500AR - you should be able to get a second hand one - but I'd want to be really sure it was faulty before I went about replacing it! It shouldn't need coding, but there is probably a priming procedure that you should do.