Code Definition

P1211 — ABS/TCS control unit communication problem

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Infiniti

About P1211

P1211 is a manufacturer-specific powertrain diagnostic trouble code recorded for Infiniti vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1211 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

On these Nissan and Infiniti vehicles the Engine Control Module (ECM) and the ABS and traction control system (TCS) control unit exchange information so the engine can reduce torque during wheel slip. DTC P1211 sets when the ECM detects a communication problem with the ABS and TCS control unit, meaning the expected data or signal from that unit is missing, corrupted or implausible. The fault commonly lies in the wiring or connectors between the two units, in the power or ground to the ABS and TCS unit, or within the ABS and TCS control unit itself. Symptoms can include a disabled traction cont...

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