Code Definition

P1122 — Throtle motor fault

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

About P1122

P1122 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.

P1122 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 Engine Control Module (ECM) continuously compares the throttle position it commands against the actual position reported by the throttle position sensors built into the electric throttle control actuator. DTC P1122 is a range and performance code that sets when the ECM detects the throttle plate is not tracking the commanded position within the expected tolerance, for example commanding 30 percent opening while the sensors report only 10 percent. On many Nissan and Infiniti applications the throttle control motor relay is a frequent cause, as it can open intermittently and cut power to the...

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