Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-83728-md50sjjs:136:3912)
    at m.mountComponent (/tmp/execjs20161208-83728-md50sjjs:47:15602)
    at /tmp/execjs20161208-83728-md50sjjs:49:31860
    at a.r.perform (/tmp/execjs20161208-83728-md50sjjs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-83728-md50sjjs:49:31821)
    at r (/tmp/execjs20161208-83728-md50sjjs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-83728-md50sjjs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-83728-md50sjjs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-83728-md50sjjs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-83728-md50sjjs:173:8

P0271 OBD-II Trouble Code: Cylinder 4 Injector Circuit High

Check Engine Light

P0271 code definition

Cylinder 4 Injector Circuit High

What the P0271 code means

This diagnostic trouble code (DTC) indicates that a reference voltage from the fuel injector associated with cylinder number 4 has gone higher than the range of acceptance set by the vehicle manufacturer. The powertrain control module (PCM) realizes this and will store a trouble code.

What are the causes of the P0271 code?

  • The fuel injector associated with cylinder number 4 is restricted causing a pressure spike and therefore a higher reference voltage.

  • The wiring or connector associated with the fuel injector on the number 4 cylinder may be damaged in some way.

  • The powertrain control module could be malfunctioning.

What are the symptoms of the P0271 code?

How does a mechanic diagnose the P0271 code?

  • A mechanic may diagnose this trouble code by first checking the fuel injector on the number 4 cylinder for proper function using the manufacturer’s suggested procedure.

  • Next, the mechanic would ensure the integrity of the wiring and connector associated with the fuel injector on cylinder number 4.

If everything checks out during these two tests:

  • The mechanic may run a fuel system cleaning through the engine to try to break any restrictions that may exist down inside the fuel injector.

  • If all else fails, the likelihood of the powertrain control module being faulty is high and it would therefore be tested and replaced as necessary.

Common mistakes when diagnosing the P0271 code

An engine diagram is essential for diagnosing this issue due to the fact that it is easy to test the wrong fuel injector without it. Testing the wrong fuel injector would be a major mistake as it would certainly lead to a misdiagnosis and potentially hours of wasted time.

How serious is the P0271 code?

Any trouble code that can cause a misfire condition would be considered very serious and should be taken care of very soon. Misfires can cause damage to the engine and certain components of the exhaust system. Ensure that all repairs are done by a qualified professional as this repair relates to the fuel system.

What repairs can fix the P0271 code?

  • Repairing or replacing wiring or connectors that are associated with the fuel injector on the number 4 cylinder

  • Replacing the fuel injector that is associated with the number 4 cylinder

  • Running a fuel system cleaning through the engine to release any restriction

  • Replacing the powertrain control module

Additional comments regarding the P0271 code

Using quality fuel in your vehicle can help to prevent the restrictions that can build up inside the fuel injectors. Bad quality fuel can gunk up inside the fuel rail and cause multiple problems such as misfires and even a no start condition. Never use old or contaminated fuel in your vehicle.

Need help with a P0271 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Post a question and get free advice from our certified mechanics.

ASK A QUESTION

More related articles

P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222 code means The manufacturer specifies a range of acceptable voltage to be produced from the throttle position...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2422 OBD-II Trouble Code: Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed
Diagnostic Trouble Code (DTC): P2422 P2422 code definition Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed Related Trouble Codes: P2441: EVAP Vent Valve Stuck Open EVAP trouble...


Related questions

Q: Died,then wouldn't crank for a few min then cranked and drive but cut out once in the way back home.

This may sound like a dumb question, but when was the last time you put gas in it? It may be possible that the fuel gauge sending unit is failing and giving you a false reading. It is also possible...

Q: Fuel pump

This may happen when the fuel pump is working intermittently or not maintaining the proper fuel pressure. This may also be related partially to the fuel pressure regulator which helps to maintain the proper fuel pressure throughout the system. When...

Q: Problem starting after fueling have to give it to start

Hello. All modern cars are equipped with an Evaporative Emission Control (EVAP) system. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the fuel vapors in the...