P120E Code - Fuel Pressure Sensor Circuit 'A' Excessive Variation
Quick Answer
The diagnostic trouble code (DTC) P120E indicates a fault with the Fuel Pressure Sensor Circuit 'A' where there is excessive variation detected. Common causes include Faulty fuel pressure sensor, Wiring issues in the sensor circuit, Problem with the fuel pump. 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
- P120E indicates Fuel Pressure Sensor Circuit 'A' Excessive Variation.
- Common causes
- Common causes include Faulty fuel pressure sensor, Wiring issues in the sensor circuit, Problem with the fuel pump.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P120E Description
The diagnostic trouble code (DTC) P120E indicates a fault with the Fuel Pressure Sensor Circuit 'A' where there is excessive variation detected. The fuel pressure sensor is a crucial component of the vehicle's fuel system, responsible for monitoring the pressure within the fuel system and sending this data to the engine control module (ECM). When the ECM detects that the fuel pressure sensor is reporting excessive variation, it means that there is an inconsistency in the fuel pressure readings that could lead to improper fuel delivery to the engine.
Common Causes of P120E
- Faulty fuel pressure sensor
- Wiring issues in the sensor circuit
- Problem with the fuel pump
- Clogged fuel filter
- Issues with the fuel pressure regulator
Symptoms of P120E
- Decreased fuel efficiency
- Engine misfires
- Rough idling or stalling
- Difficulty starting the engine
- Check engine light illuminated
How to Fix P120E
- Diagnose the specific cause of the excessive variation in the fuel pressure sensor circuit using a scan tool.
- Inspect the fuel pressure sensor and its wiring for any visible damage or corrosion.
- Test the fuel pump and fuel pressure regulator to ensure they are functioning correctly.
- Replace the faulty fuel pressure sensor if necessary.
- Clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P120E
The typical repair costs for addressing a Fuel Pressure Sensor Circuit 'A' Excessive Variation issue can vary depending on the specific cause of the problem. Generally, replacing a faulty fuel pressure sensor can cost between $100 to $250, including parts and labor. However, if the issue is related to other components such as the fuel pump or fuel pressure regulator, the repair costs can increase accordingly. It is recommended to consult with a professional mechanic to get an accurate estimate based on the specific diagnosis and repair needed for your vehicle.
Need more information about the P120E code?
Need more information on how to fix the P120E code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P120E code diagnosed by a professional: Find a repair shop in your area
Code P120E Information for Specific Makes
- P120E Ford — Fuel Pressure Sensor Circuit 'A' Excessive Variation
Frequently Asked Questions about P120E Code
1. What does the OBDII code P120E mean?
P120E indicates that the fuel pressure sensor circuit 'A' is detecting excessive variation in fuel pressure, which is outside the acceptable range set by the manufacturer.
2. What are the common symptoms of a P120E code?
Symptoms may include poor engine performance, difficulty starting, rough idling, reduced fuel efficiency, or an illuminated Check Engine Light.
3. What causes the P120E code to appear?
Common causes include a faulty fuel pressure sensor, wiring issues in the sensor circuit, a failing fuel pump, clogged fuel lines, or a malfunctioning fuel pressure regulator.
4. Can I drive with a P120E code?
Driving with this code is not recommended, as it can lead to engine performance issues or even damage due to improper fuel pressure regulation.
5. How do I diagnose a P120E code?
Diagnosis typically involves checking the fuel pressure sensor, inspecting wiring and connectors for damage, testing fuel pressure with a gauge, and using a scan tool to monitor live data.
6. How can a P120E code be fixed?
Repairs may involve replacing the fuel pressure sensor, repairing damaged wiring, cleaning or replacing clogged fuel lines, or installing a new fuel pump or pressure regulator.
7. How much does it cost to fix a P120E code?
The cost varies depending on the root cause but generally ranges from $100 to $500, including parts and labor, with sensor replacement being on the lower end of the spectrum.
8. Can a dirty fuel filter cause a P120E code?
Yes, a dirty or clogged fuel filter can restrict fuel flow, leading to pressure variations that trigger the P120E code.
9. Will resetting the Check Engine Light clear a P120E code?
Resetting the light may temporarily clear the code, but the underlying issue will cause it to return unless properly repaired.
10. What tools are needed to troubleshoot a P120E code?
You’ll need a diagnostic scan tool, a multimeter for electrical testing, and a fuel pressure gauge to measure the actual fuel pressure in the system.
Discuss the causes and fixes for P120E OBDII Code
Code P120E comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.