Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer has detected that the fuel pressure in the engine is too low, which might cause the engine to not run properly.
The engine control module (ECM) has detected that the fuel pressure in the high-pressure system is below the required threshold for proper engine operation.
P142E indicates a problem with the fuel delivery system, specifically that the pressure in the high-pressure fuel system is too low. This can affect the engine's performance and efficiency, as the fuel injectors may not be able to deliver the correct amount of fuel to the engine cylinders.
• Engine misfires
• Poor acceleration
• Check Engine Light is on
• Faulty high-pressure fuel pump
• Fuel pressure sensor malfunction
• Fuel line blockage or leak
ECM: Engine Control Module
DTC: Diagnostic Trouble Code
• Check for any other diagnostic trouble codes (DTCs) that may be related.
• Inspect the high-pressure fuel pump for proper operation.
• Test the fuel pressure sensor for accuracy.
• Replace the high-pressure fuel pump if faulty.
• Repair or replace any damaged fuel lines.
• Replace the fuel pressure sensor if it is malfunctioning.
• OBD-II scanner
• Fuel pressure gauge
• Multimeter
$300 - $1200
Moderate
• BMW 3 Series
• Audi A4
• Volkswagen Passat
• Regular maintenance of the fuel system
• Use high-quality fuel
• Replace fuel filters as recommended
Engine Performance
• Do not ignore the Check Engine Light.
• Get the vehicle inspected by a professional mechanic.
Check with the vehicle manufacturer for warranty coverage on fuel system components.
This code is often associated with direct-injection engines where high fuel pressure is critical for performance.
High – This issue can lead to poor engine performance and should be addressed promptly.
Driving with this issue can lead to further engine damage and may not be safe.
• Engine running
• Fuel system pressurized
The high-pressure fuel pump is typically located on the engine block, near the fuel rail.
Q: Can I drive with a P142E code?
A: It's not recommended as it can lead to further engine damage and poor performance.
Q: What happens if I ignore this code?
A: Ignoring it can lead to more severe engine problems and potentially higher repair costs.
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Network faults often require full-system access instead of a generic code reader alone.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.