Code Definition

C1603 — Front Right Transmitter Module Information No Signal

System: Chassis  |  Type: Manufacturer-Specific  |  Make: Citroen

About C1603

C1603 is a manufacturer-specific chassis diagnostic trouble code recorded for Citroen vehicles. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

Scanning & clearing: Chassis (C) codes are stored in the ABS, traction control, or stability-control modules. An enhanced or OEM-level scan tool is usually required to read and clear them.

C1603 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The tyre pressure monitoring system (TPMS) control module monitors radio frequency data transmitted by each wheel mounted transmitter module. DTC C1603 is set when the TPMS control module does not receive a valid identification or pressure signal from the front right wheel transmitter within a calibrated time window while the vehicle is in motion. This indicates a complete loss of communication from the front right transmitter module rather than an implausible or out of range signal. When this code is set the TPMS warning lamp is usually illuminated or flashing, the front right pressure may sh...

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