P1123 Land Rover Code - Accelerator Pedal Position Sensor Short Circuit To Battery
Quick Answer
The Accelerator Pedal Position (APP) sensor is located in plastic housing which is integral with the throttle pedal. Common causes include Faulty Accelerator Pedal Position (APP) Sensor, APP Sensor harness is open or shorted, APP Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1123 Land Rover indicates Accelerator Pedal Position Sensor Short Circuit To Battery.
- Common causes
- Common causes include Faulty Accelerator Pedal Position (APP) Sensor, APP Sensor harness is open or shorted, APP Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1123 Land Rover Description
The sensor has a spigot which protrudes into the housing and provides the pivot point for the pedal mechanism. The spigot has a slot which allows for a pin, which is attached to the sensor potentiometers, to rotate through approximately 90°, which relates to pedal movement. The pedal is connected via a link to a drum, which engages with the sensor pin, changing the linear movement of the pedal into rotary movement of the drum. The drum has two steel cables attached to it. The cables are secured to two tension springs which are secured in the opposite end of the housing. The springs provide 'feel' on the pedal movement and require an effort from the driver similar to that of a cable controlled throttle. A detente mechanism is located at the forward end of the housing and is operated by a ball located on the drum. At near maximum throttle pedal movement, the ball contacts the detente mechanism. A spring in the mechanism is compressed and gives the driver the feeling of depressing a 'kickdown' switch when full pedal travel is achieved.
The APP sensor has two potentiometer tracks which each receive 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 the two tracks are used by the ECM to determine fuelling for engine operation and also by the ECM and the 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 movement of the throttle pedal. The 'closed throttle' position signal is used by the ECM to initiate idle speed control and also overrun fuel cut-off.
What are the Possible Causes of the DTC P1123 Land Rover?
- Faulty Accelerator Pedal Position (APP) Sensor
- APP Sensor harness is open or shorted
- APP Sensor circuit poor electrical connection
How to Fix the DTC P1123 Land Rover?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1123 Land Rover code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1123 Land Rover Code
1. What are the common symptoms of OBDII code P1123 in a Land Rover related to the Accelerator Pedal Position Sensor Short Circuit To Battery?
- Common symptoms include issues with acceleration, lack of power, engine stalling, and the vehicle going into limp mode.
2. What are the possible causes of OBDII code P1123 indicating a short circuit to the battery in the Accelerator Pedal Position Sensor of a Land Rover?
- The potential causes could be a faulty accelerator pedal position sensor, damaged wiring or connectors, or an issue with the vehicle's electronic control module (ECM).
3. How can I diagnose the Accelerator Pedal Position Sensor Short Circuit To Battery issue causing OBDII code P1123 in my Land Rover?
- You can diagnose the problem by using a diagnostic scanner to retrieve the fault code, inspecting the wiring and connectors for any visible damage, and testing the sensor's resistance and voltage.
4. Is it safe to drive my Land Rover with OBDII code P1123 related to the accelerator pedal position sensor short circuit to the battery?
- It is not recommended to drive the vehicle with this issue as it can lead to further damage and potential safety hazards due to erratic acceleration behavior.
5. Can I repair the Accelerator Pedal Position Sensor Short Circuit To Battery problem triggering OBDII code P1123 in my Land Rover myself?
- While some basic troubleshooting like checking connections and wiring can be done by DIY enthusiasts, it is advisable to seek professional help for accurate diagnosis and repair of this complex issue.
6. How much does it typically cost to fix the Accelerator Pedal Position Sensor Short Circuit To Battery issue causing OBDII code P1123 in a Land Rover?
- The cost of repair can vary depending on the extent of the damage, parts needed, and labor costs, but it could range from $200 to $500 or more at a dealership or repair shop.
7. Will resetting the OBDII code P1123 related to the Accelerator Pedal Position Sensor Short Circuit To Battery in my Land Rover solve the problem?
- Simply resetting the code will not fix the underlying issue causing the fault code. It is important to diagnose and address the root cause of the problem to prevent it from reoccurring.
8. How long does it usually take to repair the Accelerator Pedal Position Sensor Short Circuit To Battery issue associated with OBDII code P1123 in a Land Rover?
- The repair time can vary based on the exact cause of the problem and the availability of parts, but it typically takes a few hours to a day for a professional mechanic to complete the repair.
9. Can extreme weather conditions affect the occurrence of OBDII code P1123 due to a short circuit in the Accelerator Pedal Position Sensor of a Land Rover?
- Yes, extreme weather conditions can sometimes exacerbate electrical issues like short circuits, so it's important to keep your vehicle well maintained and protected from harsh environmental factors.
10. Are there any preventive maintenance tips to help avoid encountering OBDII code P1123 related to the Accelerator Pedal Position Sensor Short Circuit To Battery in a Land Rover?
- Regularly inspecting and maintaining the electrical components of your vehicle, including the accelerator pedal position sensor and associated wiring, can help prevent issues like short circuits and the triggering of OBDII fault codes.
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