AutoCodes – Generic – P3159

P3159 Code - Cylinder 4 High-Pressure Fuel Injector High Side Circuit High

Quick Answer

The solenoid-controlled injection valve discharges a high-pressure spray into the combustion chamber. Common causes include Faulty Fuel Injector 4, Fuel Injector 4 harness is open or shorted, Fuel Injector 4 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: P3159 indicates Cylinder 4 High-Pressure Fuel Injector High Side Circuit High.
Common causes: Common causes include Faulty Fuel Injector 4, Fuel Injector 4 harness is open or shorted, Fuel Injector 4 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.

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Code Popularity 1,080

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P3159 Description

The solenoid-controlled injection valve discharges a high-pressure spray into the combustion chamber. The solenoid-controlled injection valve is a retracting-plunger valve characterized by a high level of flexibility in its spray-propagation pattern (angle and shape). The discharge orifices form the high-precision injection pattern. This provides even and consistent propagation. The retracting-plunger solenoid-controlled injection valve continues to maintain stable propagation properties, even at the temperatures and pressure levels encountered within the combustion chamber. Fuel is injected into the combustion chambers under high pressure (between 50 and 200 bar) during the intake and compression strokes. During the warm-up phase yet another, a minute quantity of fuel is injected to assist the catalytic converter to reach its effective operating temperature more quickly (catalytic converter heating). During cold starting, the fuel is sprayed during the compression stroke in multiple pulses. This strategy provides reliable cold-starts along with substantive improvements in the areas of pollutant emissions and fuel consumption.
The Digital Motor Electronics (DME) diagnosis monitors the activation of the high voltage side of the fuel injector. The Diagnostic Trouble Code (DTC) is detected when there is a short circuit to B+.

OBDII Code P3159 - Cylinder 4 High-Pressure Fuel Injector High Side Circuit High - AutoCodes.com — P3159 Code - Cylinder 4 High-Pressure Fuel Injector High Side Circuit High

What does this mean?

What are the Possible Causes of the DTC P3159?

Faulty Fuel Injector 4
Fuel Injector 4 harness is open or shorted
Fuel Injector 4 circuit poor electrical connection
Faulty Digital Motor Electronics (DME)

How to Fix the DTC P3159?

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 P3159 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.

Need more information about the P3159 code?

Need more information on how to fix the P3159 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P3159 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P3159 BMW — Cylinder 4 High-Pressure Fuel Injector High Side Circuit High
P3159 MINI — Cylinder 4 High-Pressure Fuel Injector High Side Circuit High

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P3159 Code

1. What are common symptoms of OBDII code P3159 (Cylinder 4 High-Pressure Fuel Injector High Side Circuit High)?

Symptoms may include rough idling, engine misfires, loss of power, and potentially a decrease in fuel efficiency.

2. What are the possible causes of OBDII code P3159?

Possible causes include a faulty high-pressure fuel injector, issues with the high-pressure fuel pump, wiring or connector problems in the fuel injector circuit, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the issue causing OBDII code P3159?

Diagnosis typically involves inspecting the high-pressure fuel injector and its circuit for any visible damage, testing the fuel injector's resistance, checking the high-pressure fuel pump operation, and scanning the ECM for related fault codes.

4. Can a dirty fuel injector cause OBDII code P3159?

While a dirty fuel injector may not directly cause this specific code, it can contribute to issues with fuel delivery and combustion, potentially leading to related problems like misfires that trigger code P3159.

5. Is it safe to continue driving with OBDII code P3159 present?

It is not recommended to drive with this code present, as it can lead to engine performance issues and potentially cause further damage to components like the fuel injector or high-pressure fuel pump.

6. How can I repair OBDII code P3159?

Repair options may include replacing the faulty high-pressure fuel injector, repairing any damaged wiring or connectors in the circuit, addressing issues with the high-pressure fuel pump, or resetting the ECM after fixing the underlying problem.

7. Can OBDII code P3159 be triggered by a bad fuel pressure sensor?

While a bad fuel pressure sensor may not directly trigger this specific code, it can contribute to fuel delivery issues that may lead to related problems like those associated with code P3159.

8. How much does it typically cost to repair OBDII code P3159?

The cost of repair can vary depending on the specific cause of the code, but it may range from a few hundred dollars for basic repairs like replacing a fuel injector to more significant costs if there are multiple underlying issues.

9. Are there any preventive maintenance steps to avoid OBDII code P3159?

Regularly servicing the fuel system, using high-quality fuel, and addressing any engine performance issues promptly can help prevent problems that may trigger code P3159.

10. Can a DIY enthusiast repair OBDII code P3159, or is it best left to professionals?

While some basic diagnostics and repairs may be possible for experienced DIY enthusiasts, dealing with complex fuel system components and electrical circuits involved in code P3159 may be best left to professional mechanics with the necessary tools and expertise.