LAND ROVER ERR4278 Throttle Position Sensor Tps 3.9

( Brand: Land Rover ), ( Part Type: Throttle Sensor ), ( Manufacturer Part Number: ERR4278 ), ( Vintage Part: No ), ( Fuel Type: Gasoline )

Review LAND ROVER Discovery 3.9 Liter Throttle Position Sensor Tps fits 1994–1995

The Land Rover TPS, or Throttle Position Sensor, part number ERR4278, is a crucial component in the fuel injection system of certain 1994 and 1995 Land Rover models equipped with the 3.9-liter V8 engine. This sensor is responsible for measuring the position of the throttle butterfly valve and transmitting this information to the engine management system.

The TPS is a compact electronic device, usually mounted near the throttle body. It consists of a potentiometer with a throttle position sensor element. When the throttle valve opens, the sensor element's resistance changes accordingly, sending a voltage signal to the engine control unit (ECU). The ECU then uses this signal to calculate the required fuel injection and ignition settings for the engine, ensuring optimal performance and fuel efficiency.

The ERR4278 TPS is a critical part in maintaining the overall health and efficiency of a Land Rover vehicle. A faulty sensor can lead to issues such as poor engine performance, stalling, and even engine damage. Symptoms of a failing TPS include rough idling, hesitation during acceleration, and a check engine light illuminated on the dashboard.

When replacing the TPS, it is essential to use a genuine Land Rover part like the ERR4278. Aftermarket alternatives may not provide the same level of accuracy and reliability, potentially leading to further complications and unnecessary repair costs.

Installing the new TPS involves removing the old sensor, cleaning the area around the throttle body, and securing the new sensor in place. The process typically requires some mechanical knowledge and experience, and it is recommended that the replacement be carried out by a qualified professional to ensure proper installation and function.

In summary, the Land Rover TPS, part number ERR4278, is a vital component in the fuel injection system of select 1994 and 1995 Land Rover vehicles with the 3.9-liter V8 engine. It measures the position of the throttle butterfly valve and sends the necessary information to the engine control unit for optimal engine performance. When the TPS fails, it can lead to various issues, making it essential to use a genuine Land Rover part and have it installed by a qualified professional.

The Land Rover Discovery Series II, specifically the 1994-1995 models with the 3.9 liter engine, comes with its unique set of advantages and disadvantages when it comes to replacing the Throttle Position Sensor (TPS). Here's a straightforward analysis:

1. Availability of Aftermarket Parts: You can find both OEM and aftermarket TPS options for the Land Rover Discovery Series II. Replacing the TPS is a common repair, and many automotive parts stores and online retailers carry the required sensor.

2. Relatively Simple Repair: The TPS is an electrical component, and the repair process is less invasive compared to replacing mechanical parts. The sensor is easily accessible under the intake manifold, and the replacement process typically involves disconnecting a few electrical connections.

3. Improved Performance: A faulty TPS can cause poor fuel efficiency, hesitation during acceleration, and rough idling. Replacing the TPS can help restore smooth engine performance and potentially improve fuel economy.

1. Cost: The cost of a new TPS can vary, depending on whether you choose an OEM or aftermarket part. Expect to pay anywhere from $100 to $300 for the sensor itself, plus labor costs if you opt for professional installation.

2. Potential for Additional Issues: Replacing the TPS does not guarantee a permanent solution. If other sensors or electrical components are malfunctioning, the new TPS may still not function correctly, leading to additional repair costs.

3. Diagnostic Challenges: Identifying a faulty TPS can be a challenge, as the symptoms can be similar to other engine issues. Misdiagnosis could lead to unnecessary repairs and additional expenses.

The decision to replace the TPS on a 1994-1995 Land Rover Discovery Series II, 3.9 liter engine, depends on several factors, including the severity of the issue, the cost of the repair, and your personal preference for OEM or aftermarket parts. If you're experiencing noticeable symptoms like poor acceleration, rough idling, or hesitation, and after consulting a professional mechanic, replacing the TPS may be a worthwhile investment. However, if you're uncertain about the diagnosis, it's advisable to investigate other potential causes before committing to the repair.

If you've confirmed that the TPS is the root cause of the issue, I recommend replacing it with a high-quality aftermarket sensor from a reputable manufacturer. Ensure that you follow the installation instructions carefully to avoid any complications. If you're unsure about the repair process, consider taking the vehicle to a professional mechanic for a more comprehensive assessment.

part # err4278 prices

• $354.91-$486.95

specifications injectiopug:

• for years: 1994-1995
• brand: Land Rover
• part type: Throttle Sensor
• manufacturer part number: ERR4278
• vintage part: No
• fuel type: Gasoline

shipping injectiopug:

• type: Fixed
• cost: $0.00
• carrier: UPS
• class: Standard
• service: UPS Ground
• transit: 3-7 Days

general injectiopug:

• Air Fuel Delivery > Fuel Injection Parts > Additional Fuel Injection Parts
• condition: Used

seller injectiopug:

• # reviews: 12409
• rating: 99.2%

offer injectiopug:

• sold: 0
• started: May 12, 2025
• availability: In Stock
• options: Ship-to-home
• best offers: True
• quantity: 1

payments injectiopug:

• credit card: Visa
• wallet: Apple-pay
• other

returns injectiopug:

• time: 30 Days
• policy: Returns Accepted
• paid by: Buyer

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