Abs/esp faulty gearbox light's on

[Omerhsn]

Hello, I'm new here need help please.

First sorry for my bad English.

Just bought new Citroen c4 grand picasso 1.6 hdi semi automatic 2007. But lights on dashboard Abs/esp faulty gearbox
Plug obd scanner (cheap one) and fault codes is U0415, U0121,U0122
I was checked all wires from back battery all Fuses but cannot fixed. Also cleaned abs sensors front both and what found unplugged the sensor and check there is no any 12v where is going to sensor. Checked other one same no any 12v both cables. Checked where is going sensor cables and they going to abs modul/pump.
Can some with more experience can help me please. And if someone help with wiring diagram?
Also not drive automatic only manual and 1-2-3 gear
Thank you

[GiveMeABreak]

You may have missed part of that first fault code out 'U415' seems a bit short, but providing your VIN will help.

[Omerhsn]

Sorry yes it's U0415.
VIN: VF7**************[VIN obfuscated, can be read by forum staff]

Thanks

[GiveMeABreak]

The last 2 faults should be looked at first because it looks like they are causing the issue with the U0415 fault.

If there is a problem wit the CAN data circuit the information will affect other systems.

The clue here is have you had any work done lately, specifically on the front wheels? Even brake pads, or discs, when being fitted may have caused the fitter to knock a sensor and damage it or disrupt some wiring. It doesn't like the data it is getting from the front wheel speed sensors as an average, so something is not right.

Fault Code:	U0415
Description of Fault:	Fault with the information sent by either the ABS/ESP ECU or the electric parking brake ECU : Value received incorrect. The average front wheel speed information on the CAN is incorrect. The time of appearance of the fault code is 1s. Context of appearance of the fault code: Ignition on Technical precision on the context of appearance of the fault code: Supply voltage correct between 8V and 16V (Pin 3 of the 28-way connector) No communication fault on the CAN Absence of fault codes U1000 - U1003 - U1113 The system is not in starting phase
Conditions for Fault to clear:	Reception of 20 consecutive items of valid information
Downgrade Modes whilst Fault is active:	The gears above 3rd gear cannot be engaged Change of gear impossible in the presence of additional faults (Input shaft speed, Engine speed, Gearbox input speed, Accelerator pedal position.)
Symptoms:	Difficult/impossible to change a gear Lack of power
Suspect Areas:	28-way harness of the piloted manual gearbox ECU ABS/ESP ECU Electric parking brake

Fault Code:	U0121
Description of Fault:	CAN communication: Absence of communication with the ABS ECU. Absence of communication with the ABS ECU.
Conditions for Fault to clear:	Ignition on
Downgrade Modes whilst Fault is active:	Deactivation cruise control until the next time the ignition is switched on Deactivation speed limiter until the next time the ignition is switched on Switching on of the warning lamp and/or warning message: Warning lamp MIL
Symptoms:	-
Suspect Areas:	CAN network

Fault Code:	U0122
Description of Fault:	CAN communication : Absence of communication with the ESP ECU.
Conditions for Fault to clear:	Ignition on
Downgrade Modes whilst Fault is active:	Deactivation cruise control until the next time the ignition is switched on Deactivation speed limiter until the next time the ignition is switched on Switching on of the warning lamp and/or warning message: Warning lamp MIL
Symptoms:	-
Suspect Areas:	CAN network

[Omerhsn]

Thank you for information and help, but there is no 12v on wire where is coming to sensors from Abs module. Does abs module is gone ? I was watch many videos and read on forums did many thinks but no solution till now. Think the battery is old and ordered new one we will see with new one. Can you find for me abs wire diagram please? Thank you

[Omerhsn]

Got new battery still same today will do cleaning fuse box near battery with contact cleaner and dry well and after will see what's happening. I like this car but still with problems can't drive previous owner last change gear box (not actuator only gearbox) , clutch kit, new egr whic i can see is brand new.

[Omerhsn]

Nothing change ordered second hand abs pump/module same part number i hope this will fix everything

[Omerhsn]

Hello some one can you help me please i got better scanner and my fault codes is:

Automatic or piloted gearbox:
U1213
U0415
P0949
P1800

Engine management ECU:
P1350
P1394
P1351

ABS/ESP:
C1398
C1320
C1330
C139D
U1219

Electronic parking brake:
U1213

Any advice please. Thank you

[Husso]

Hiya DID you manage to solve the issue ?