P1123 FORD Possible Causes

• Faulty throttle position sensor
• Throttle position sensor circuit open or shorted
• Poor electrical connection in throttle position sensor circuit
• Faulty Powertrain Control Module (PCM)

How to Fix P1123 FORD 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

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

P1123 FORD Meaning

The Powertrain Control Module (PCM) monitors the throttle position sensor. The PCM sets this diagnostic trouble code (DTC) when it detects the throttle position sensor circuit has intermittent high voltage.
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✅ Possible Causes of Hyundai P1123 Code

• Leak at the fuel pressure regulator or injectors
• Internal mechanical engine problem
• Faulty oxygen sensor (HO2S)

🔧 How to Diagnose and Repair P1123 Code?

Start by examining the possible causes mentioned above. Perform a thorough visual inspection of the wiring harness and associated connectors. Look for any signs of damage, bent pins, broken, pushed-in, or corroded pins.

⚠️ Common Associated Symptoms

• Engine light illuminated on the dashboard (Check Engine)
• Possible decrease in performance or excessive fuel consumption

📘 Meaning of Hyundai P1123 Code

The P1123 code generally corresponds to a long-term rich air/fuel mixture (Fuel Trim Rich). This is a generic description, and depending on the year and model of your Hyundai vehicle, the manufacturer may use a more specific designation.

Note: Precise information about this code may vary by model. If in doubt, it is recommended to consult the manufacturer’s technical documentation or seek professional assistance.

P1123 LAND-ROVER Possible Causes

• Faulty Accelerator Pedal Position (APP) Sensor
• APP Sensor Wiring Harness Open or Shorted
• Poor Electrical Connection in APP Sensor Circuit

How to Fix P1123 LAND-ROVER 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

Check Engine Light On (or Service Engine Soon Warning Light)
No Throttle Response

P1123 LAND-ROVER Meaning

The Accelerator Pedal Position (APP) sensor is located in a plastic housing integrated with the accelerator pedal. The housing is injection molded and provides a mounting location for the APP sensor. The sensor is externally mounted on the housing and is secured with two Torx screws. The external body of the sensor has a six-pin connector that accepts a connector from the vehicle’s wiring harness.

The sensor has a lug that protrudes into the housing and provides the pivot point for the pedal mechanism. The lug has a slot that allows a pin, which is attached to the sensor’s potentiometers, to rotate approximately 90°, corresponding to the pedal movement. The pedal is connected via a linkage to a drum, which engages with the sensor pin, converting the linear motion of the pedal into rotational motion of the drum. The drum is connected to two steel cables. The cables are attached to two tension springs that are secured at the opposite end of the housing. The springs provide a “feel” to the pedal movement and require driver effort similar to a cable-operated throttle. A detent mechanism is located at the front end of the housing and is actuated by a ball located on the drum. At nearly maximum accelerator pedal movement, the ball contacts the detent mechanism. A spring in the mechanism is compressed and gives the driver the sensation of pressing a “kickdown” switch when full pedal travel is reached.

The APP sensor has two potentiometer tracks, each receiving a 5V input voltage from the ECM. Track 1 provides an output of 0.5V with the pedal at rest and 2.0V at 100% full throttle. Track 2 provides an output of 0.5V with the pedal at rest and 4.5V at 100% full throttle. The signals from both tracks are used by the ECM to determine fuel supply for engine operation and also by the ECM and EAT ECU to initiate a kickdown request for the automatic transmission.

The ECM monitors the outputs from each of the potentiometer tracks and can determine the position, rate of change, and direction of the accelerator pedal movement. The “throttle closed” position signal is used by the ECM to initiate idle control and also to interrupt fuel cut-off.

P1123 LEXUS Possible Causes

• Coolant flow control valve
• Faulty coolant flow control valve position sensor
• Coolant flow control valve position sensor harness is open or shorted
• Poor electrical connection in coolant flow control valve position sensor circuit
• Faulty Engine Control Module (ECM)

How to Fix P1123 LEXUS 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

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

P1123 LEXUS Meaning

This system uses an electric pump to supply hot coolant stored in the heat storage tank in the engine cylinder head, to optimize engine start-up combustion and reduce the amount of unburned gas discharged during engine starting. The water valve for the Coolant Heat Storage (CHS) system, located at the heater pipes, controls coolant passages to the engine, heater core, and coolant heat storage tank according to system operating conditions.

P1123 LINCOLN Possible Causes

• Faulty throttle position sensor
• Throttle position sensor harness is open or shorted
• Poor electrical connection in the throttle position sensor circuit
• Faulty Powertrain Control Module (PCM)

How to Fix P1123 LINCOLN 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

Check Engine Light illuminated (or Service Engine Soon warning light)

P1123 LINCOLN Meaning

The Powertrain Control Module (PCM) monitors the throttle position sensor. The PCM sets this Diagnostic Trouble Code (DTC) when it detects that the throttle position sensor circuit has intermittent high voltage.

P1123 MAZDA Possible Causes

• Faulty throttle position sensor
• Throttle position sensor harness is open or shorted
• Poor electrical connection in throttle position sensor circuit
• Faulty Powertrain Control Module (PCM)

How to Fix P1123 MAZDA 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

Illuminated engine light (or engine service warning light soon)

P1123 MAZDA Meaning

The Powertrain Control Module (PCM) monitors the throttle position sensor. The PCM sets this Diagnostic Trouble Code (DTC) when it detects the throttle position sensor circuit has intermittent high voltage.

P1123 MERCURY Possible Causes

• Faulty throttle position sensor
• Throttle position sensor harness is open or shorted
• Poor electrical connection in the throttle position sensor circuit
• Faulty Powertrain Control Module (PCM)

How to Fix P1123 MERCURY 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)

P1123 MERCURY Meaning

The Powertrain Control Module (PCM) monitors the throttle position sensor. The PCM sets this Diagnostic Trouble Code (DTC) when it detects that the throttle position sensor circuit has intermittent high voltage.

P1123 MINI Possible Causes

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

How to Fix P1123 MINI 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

Illuminated engine light (or service engine soon warning light)

P1123 MINI Meaning

Pedal Position 1 High Input is the generic description for P1123 Mini code, but the manufacturer may have a different description for your vehicle model and year. Currently, we don’t have additional information about the P1123 Mini OBDII code.

P1123 TOYOTA Possible Causes

• Coolant flow control valve
• Faulty coolant flow control valve position sensor
• Coolant flow control valve position sensor harness is open or shorted
• Poor electrical connection in the coolant flow control valve position sensor circuit
• Faulty engine control module (ECM)

How to Fix P1123 TOYOTA 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

Illuminated engine light (or engine service warning light soon)

P1123 TOYOTA Meaning

This system uses an electric pump to supply hot coolant stored in the heat storage tank in the engine cylinder head, in order to optimize engine start-up combustion and reduce the amount of unburned gas discharged during engine start-up. The water valve for the Coolant Heat Storage (CHS) system, located at the heater pipes, controls coolant passages to the engine, heater core, and coolant heat storage tank according to system operating conditions.

P1123 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 P1123 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)

P1123 VOLKSWAGEN Meaning

Long term fuel trim, bank 1 system too rich is the generic description for Volkswagen P1123 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we don’t have more information about Volkswagen P1123 OBDII code.