Code Definition

C1604 — Rear Left Transmitter Module Information No Signal

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

About C1604

C1604 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.

C1604 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 on this Citroen continuously monitors radio frequency data from each wheel mounted transmitter module. DTC C1604 is stored when the control module fails to receive a valid identification or pressure signal from the rear left tyre pressure transmitter within a specified time period while the vehicle is in motion. This indicates a total loss of communication from the rear left transmitter module rather than an out of range pressure reading. The driver typically sees a TPMS warning lamp illuminated and the rear left wheel reading missing o...

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