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. |
| U1001 | CAN communication |
| 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 |
Last Reviewed: 16 April 2021Copyright © 2004...2021 Mark Stammers