🔧 P1124 MERCURY – Diagnosis and Repair
⚙️ Possible Causes
- Bent throttle linkage or rod
A deformation in the linkage system can affect motion transmission. - Faulty throttle position sensor
The TPS may not provide a correct reading of the throttle position. - Open or shorted throttle position sensor harness
A wiring issue can disrupt the signal sent to the control module. - Poor electrical connection in the throttle position sensor circuit
Damaged connectors (broken, bent, pushed, or corroded pins) can impair communication.
🛠️ How to Fix P1124 MERCURY Code?
- Check possible causes
Start by examining the items listed above. - Visual inspection
- Thoroughly inspect the wiring harness and connectors.
- Look for damaged components and check the condition of connector pins.
- Testing and replacement
- Test the throttle position sensor (TPS) to ensure it meets specifications.
- Repair or replace faulty components (wiring, connectors, or sensor).
💡 What Does It Mean?
The throttle position (TP) sensor circuit is monitored by the Powertrain Control Module (PCM) to ensure the rotation angle and voltage reading remain within defined ranges.
The test fails if:
- The reading is below 13.27% (0.66 volt)
- Or above 23.52% (1.17 volt)
⏰ When Is the Code Detected?
The P1124 MERCURY code is triggered when the Engine Control Module (ECM) detects, under idle conditions, a throttle position (TP) sensor return voltage that is outside the expected values.
🚨 Possible Symptoms
- Check engine light on (or engine warning light)
ℹ️ Meaning of P1124 MERCURY Code
The throttle position sensor (TPS) responds to the movement of the accelerator pedal.
This sensor, a rotary potentiometer type, provides a signal proportional to the throttle position to the Powertrain Control Module (PCM).
The PCM uses this signal to determine several operating conditions:
- Throttle closed (includes idle or deceleration)
- Partial throttle (includes cruise or moderate acceleration)
- Wide open throttle (for maximum acceleration or during throttle release)
- Throttle angle rate
If the measured signal is outside the specified ranges, the PCM records the P1124 MERCURY code to indicate an anomaly in throttle position management.