P1124 Volvo Throttle Control Motor Relay Circuit Short

Possible causes

– Fualty Throttle Control Motor relay
– Throttle Control Motor relay harness is open or shorted
– Throttle Control Motor relay circuit poor electrical connection

What about the obd code?

Engine Control Module (ECM) detect the throttle control motor relay is stuck ON.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1124 Volvo Description

Power supply for the throttle control motor is provided to the Engine Control Module (ECM) via throttle control motor relay. The throttle control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not provided to the ECM.