P1124 MERCURY – Throttle Position Sensor Out of Self-Test Range

🔧 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?

  1. Check possible causes
    Start by examining the items listed above.
  2. Visual inspection
    • Thoroughly inspect the wiring harness and connectors.
    • Look for damaged components and check the condition of connector pins.
  3. 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.

P1124 MINI – Differential Pressure Sensor Intake Manifold Adaptation

P1124 MINI Possible Causes

  • Differential pressure sensor adaptation
  • Differential pressure sensor wiring harness is open or short-circuited
  • Poor electrical connection in the differential pressure sensor circuit

How to Fix P1124 MINI Code?

Start by checking the “possible causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Check engine light on (or service engine soon warning light)

P1124 MINI Meaning

Intake manifold differential pressure sensor adaptation is the generic description for P1124 Mini code, but the manufacturer may have a different description for your specific vehicle model and year. Currently, we don’t have more information about the P1124 Mini OBDII code.

P1124 NISSAN – Throttle Actuator Control Motor Relay Short Circuit

📌 Meaning of Code P1124

The code P1124 on a Nissan vehicle indicates that the throttle control motor relay (also called Throttle Control Motor Relay) is stuck (remained in open or closed position). This prevents the ECM (Engine Control Module) from properly controlling the throttle opening in an electronic throttle control system (ETC, Electronic Throttle Control).

In short, the ECM loses control of the throttle motor, which can cause abnormal engine behavior or activation of limp mode.

⚠️ Possible Symptoms

  • ✅ Check Engine Light (MIL) on

  • 🚫 Slow or impossible acceleration

  • ⚠️ Safety mode activated (limited speed)

  • 🛠️ Unstable idle

  • 🚨 Abnormal accelerator pedal response

🛠️ Possible Causes

  1. Faulty throttle control motor relay – Main component often responsible.

  2. Open or shorted wiring – Cut, rubbed, or melted cables between the relay and ECM.

  3. Poor or corroded electrical connection – Loose or oxidized connectors.

  4. ECM problem (rare) – If the relay is good but remains inactive/uncontrolled, the ECM might be faulty.

✅ How to Fix Nissan Code P1124

🔧 Step 1: Visual Inspection

  • Locate the throttle control motor relay (often in the engine relay/fuse box).

  • Check the associated wiring and connectors:

    • No broken, melted, or exposed wires.

    • Connector pins clean, not bent, not corroded.

🔄 Step 2: Relay Test

  • Temporarily replace the relay with an identical one (same reference) to see if the problem disappears.

  • Or test the relay with a multimeter:

    • Check continuity between the control terminals (coil).

    • Apply 12V to the control terminals to see if the relay “clicks” (closes).

⚡ Step 3: Check Power Supply

  • Ignition ON, check if the relay output terminal provides 12V to the ECM.

  • If the relay works mechanically but is not controlled, suspect an ECM or ignition sensor fault.

🧪 Step 4: Code Clearing

  • Clear the P1124 code with an OBD-II diagnostic tool.

  • Restart the engine and test acceleration.

  • If the code returns, check the relay or wiring in depth.

💡 Tip

This code can make the vehicle unusable or very limited for driving. It is important to act quickly. The relay is inexpensive and is the first part to replace if no visible anomaly is found in the wiring.

P1124 VOLKSWAGEN – Long Term Fuel Trim System, Bank 1 Too Lean

P1124 VOLKSWAGEN Possible Causes

  • Faulty HO2S
  • Faulty mass air flow sensor
  • High fuel pressure
  • Purge canister solenoid stuck open
  • HO2S harness open or shorted
  • Poor electrical connection in HO2S circuit

How to Fix P1124 VOLKSWAGEN Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Engine light on (or engine service warning light soon)

P1124 VOLKSWAGEN Meaning

Long term fuel trim, bank 1 system too lean is the generic description for Volkswagen P1124 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we don’t have further information about Volkswagen P1124 OBDII code.

P1125 – Intermittent Throttle Position Sensor

P1125 Possible Causes

  • Faulty accelerator pedal position sensor
  • Accelerator pedal position sensor harness is open or shorted
  • Poor electrical connection in accelerator pedal position sensor circuit

How to Fix Code P1125?

Start by checking the “Possible Causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Engine light on (or engine service soon light)

P1125 Meaning

The accelerator pedal position (APP) sensor 1 and APP sensor 2 are potentiometer-type sensors, each with the following circuits:

• A 5-volt reference circuit
• A low reference circuit
• A signal circuit

The control module provides the APP sensors with a 5-volt reference circuit and a low reference circuit. The APP sensors then provide the control module with signal voltages proportional to pedal movement. The APP sensor 1 signal voltage is low at rest and increases when the pedal is depressed.
The APP sensor 2 signal voltage is low at rest and increases when the pedal is depressed. When the control module detects that the APP sensor 1 and APP sensor 2 signal circuits don’t correlate with each other, DTC P1125 is set.

P1125 FORD F150 – Intermittent Throttle Position Sensor

P1125 1997 FORD F150 Possible Causes

  • Faulty throttle position sensor
  • Throttle position sensor wiring harness is open or short-circuited
  • Poor electrical connection in throttle position sensor circuit

How to Fix P1125 Code on 1997 FORD F150?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

What Does It Mean?

The TP sensor circuit is monitored by the PCM for a sudden change in TP rotation angle input (or voltage) through the comprehensive component monitor (CCM). If during the last 80 key-on engine warm-up cycles, the PCM detects a TP rotation angle (or voltage) change beyond the minimum or maximum calibrated limit, a continuous diagnostic trouble code (DTC) is stored.

When Is the Code Detected?

The Engine Control Module (ECM) detected the Throttle Position (TP) sensor voltage extending above or below calibrated limits

Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P1125 1997 FORD F150 Meaning

The throttle position sensor (TPS) responds to accelerator pedal movement. The TPS is a rotary potentiometer sensor that provides a signal to the Powertrain Control Module (PCM) that is linearly proportional to throttle plate/shaft position. As the TPS is rotated by the throttle shaft, the following operating conditions are determined by the PCM:
• Closed throttle (includes idle or deceleration)
• Part throttle (includes cruise or moderate acceleration)
• Wide open throttle (includes maximum acceleration or crank flare)
• Throttle angle rate

P1125 AUDI – Long Term Fuel Trim Adjustment System, Bank 2 Too Rich

P1125 AUDI Possible Causes

  • Faulty HO2S
  • Faulty mass air flow sensor
  • High fuel pressure
  • Purge canister solenoid stuck open
  • HO2S harness open or shorted
  • Poor electrical connection in HO2S circuit

How to Fix P1125 AUDI Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Engine light on (or service engine soon warning light)

P1125 AUDI Meaning

Bank 2 Long Term Fuel Trim System Too Rich is the generic description for Audi P1125 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about the Audi P1125 OBDII code.

P1125 BUICK – Accelerator Pedal Position Sensor Malfunction

P1125 BUICK Possible Causes

  • Faulty accelerator pedal position sensor
  • Accelerator pedal position sensor harness is open or shorted
  • Poor electrical connection in accelerator pedal position sensor circuit

How to Fix P1125 BUICK Code?

Start by checking the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

The Powertrain Control Module (PCM) detects that the difference between Accelerator Pedal Position (APP) sensor 1 and APP sensor 2 is greater than the expected value.

Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P1125 BUICK Meaning

The Accelerator Pedal Position (APP) sensor 1 and APP sensor 2 are potentiometer-type sensors, each with the following circuits:
• A 5-volt reference circuit
• A low reference circuit
• A signal circuit
The control module provides the APP sensors with a 5-volt reference circuit and a low reference circuit. The APP sensors then provide the control module with signal voltages proportional to pedal movement. The signal voltage from APP sensor 1 is low at rest and increases when the pedal is depressed.
The signal voltage from APP sensor 2 is low at rest and increases when the pedal is depressed. When the control module detects that the signal circuits of APP sensor 1 and APP sensor 2 do not correlate with each other, DTC P1125 is set.

P1125 CADILLAC – Accelerator Pedal Position Sensor Malfunction

P1125 CADILLAC Possible Causes

  • Faulty accelerator pedal position sensor
    Accelerator pedal position sensor harness is open or shorted
    Poor electrical connection in accelerator pedal position sensor circuit

How to Fix P1125 CADILLAC Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

The Powertrain Control Module (PCM) detects that the difference between accelerator pedal position sensor 1 (APP) and APP sensor 2 is greater than the expected value.

Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P1125 CADILLAC Meaning

The accelerator pedal position sensor 1 (APP) and APP sensor 2 are potentiometer-type sensors, each with the following circuits:
• A 5-volt reference circuit
• A low reference circuit
• A signal circuit
The control module provides the APP sensors with a 5-volt reference circuit and a low reference circuit. The APP sensors then provide the control module with signal voltages proportional to pedal movement. The signal voltage from APP sensor 1 is low at rest and increases when the pedal is depressed.
The signal voltage from APP sensor 2 is low at rest and increases when the pedal is depressed. When the control module detects that the signal circuits of APP sensor 1 and APP sensor 2 do not correlate with each other, DTC P1125 is set.

P1125 CHEVROLET – Accelerator Pedal Position Sensor Malfunction

P1125 CHEVROLET Possible Causes

  • Faulty accelerator pedal position sensor
  • Accelerator pedal position sensor harness is open or shorted
  • Poor electrical connection in accelerator pedal position sensor circuit

How to Fix P1125 CHEVROLET Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

The Powertrain Control Module (PCM) detects that the difference between the Accelerator Pedal Position (APP) sensor 1 and APP sensor 2 is greater than the expected value.

Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P1125 CHEVROLET Meaning

The Accelerator Pedal Position (APP) sensor 1 and APP sensor 2 are potentiometer-type sensors, each with the following circuits:
• A 5-volt reference circuit
• A low reference circuit
• A signal circuit

The control module provides the APP sensors with a 5-volt reference circuit and a low reference circuit. The APP sensors then provide the control module with signal voltages proportional to pedal movement. The signal voltage from APP sensor 1 is low at rest and increases when the pedal is depressed.
The signal voltage from APP sensor 2 is low at rest and increases when the pedal is depressed. When the control module detects that the signal circuits of APP sensor 1 and APP sensor 2 do not correlate with each other, DTC P1125 is set.