U1121 Citroen Saxo OBD Code

OBD/2 U1121 error code description and symptoms.

Vehicle Speed Sensor (VSS) Intermittent Indicates the powertrain control module (PCM) detected an error in the vehicle speed information. Vehicle speed data is received from either the vehicle speed sensor (VSS), transfer case speed sensor (TCSS), anti-lock brake system (ABS) control module, generic electronic module (GEM), or central timer module (CTM). This DTC is set the same way as U1121. However, it is intended to flash the transmission control indicator lamp (TCIL) for first time VSS circuit error/malfunctions. Refer to possible causes for U1121

In most cases, the TCM is integrated into a single housing with the PCM. Nevertheless, the section of the module which controls (automatic) transmission function may be powered up separately. In any case, the TCM is typically powered using switched (only present with the ignition switch in the ON, start, or run position) voltage. This circuit is normally equipped with a fuse, fusible link, and/or a relay. Frequently, the PCM and TCM are powered using the same relay albeit by separate circuits. Access to a reliable vehicle information source will yield necessary details of the TCM power circuit for the specific vehicle in question.

U1121 Citroen Saxo Error Code Repair Process :

If your u1121 scp (j1850) invalid or missing data for primary id check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system U1121 and engine control unit are in charge of monitoring a bunch of different u1121 scp (j1850) invalid or missing data for primary id, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Citroen Saxo U1121 OBD2 Code

A common cause of code U1121 is the failure of U1121 SCP (J1850) Invalid or Missing Data for Primary Id, but there are several other possible causes as well, such as ;

EVAP system hose leaking
Faulty ignition coil (s)
Insufficient cylinders compression
Open or short in the VCT circuit

U1121 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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U1121 Citroen Saxo OBD Code

U1121 Citroen Saxo Error Code Repair Process :

Common Causes of Citroen Saxo U1121 OBD2 Code

U1121 code for other Citroen cars