The table below is the list of, manufacturer specific "U" codes available for Peugeot / Citroen. (They have been collated over a period of time and from various sources. They may not be accurate)
U1XXX - Network Communication
|U0040||EDC16C3 - Multiplexing. Fault on VAN/CAN|
|U0046||EDC16C3 - Multiplexing. Fault on VAN/CAN|
|U0121||- MM6LP. Configuration.
EDC16C3 - Multiplexing. No communication with the ABS.
|U0122||EDC16C3 - Multiplexing. Absence of communication with the ESP|
|U0415||- Johnson Controls J34P. Automatic gearbox ECU reception. No Signal.
J34P - No vehicle speed information transmitted by the ABS/ESP ECU. No signal.
|U1000||SID 801 - CAN communication with Engine ECU
MM6LP - The engine ECU does not communicate any longer on the system.
|U1003||SID 801 - CAN communication
MM6LP - No communication on the network.
|U1108||Auto gearbox communication fault with engine management (ECM)|
|U1118||SID 803 - (407)Receiving fault. Multiplexing. No BSI or air conditioning communication.??( with ECM).
MM6LP - Dialogue with BSI. No communication with the BSI.
|U1167||Fault in pressure regulation - AL4 - (variation / recommendation)|
|U1213||Tyre Under inflation dection (807 CAN) - Fault in vehicle speed information received by the CAN from the ABS/ESP ECU.
AL4 (807) Function ESP. Coherence. (CAN)
|U1218||MM6LP - Dialogue with BSI. Incorrect value received.|
|U1308||Engine speed signal. No signal - AL4 - injection throttle potentiometer (CAN)|
|U1313||AL4 - Vehicle speed transmitted by the ABS (CAN).|
|U1600||EDC15C7 - Coded immobiliser. Wrong key|
|U2000||Reception of main wake-up request information|
|U2001||SID 803 Multiplexing. Remotely controlled triggering information not coherent. (CAN)|
|U2003||Remote controlled wake-up inconsistency between main wake-up signal and electrical signal|
|C1187||Battery voltage. Engine running voltage too low.|
|C1327||Bosch ABS/ESP - Left hand rear wheel speed sensor circuit. Low input. (Coherence).|
|C1337||Bosch ABS/ESP - Right hand rear wheel speed sensor circuit. Low input. (Coherence).|
|C1408||DAE (PAS) - No vehicle speed information|
|C1604||Under inflation detection.(407). Absence of rear left valve. fault|