P0263 OBD-II Trouble Code: Cylinder Number 1 Contribution/Balance Fault

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0263 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0263 code

P0263 is a diagnostic trouble code (DTC) for "Cylinder Number 1 Contribution/Balance Fault". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0263 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P0263 code definition

Cylinder Number 1 Contribution/Balance Fault

What the P0263 code means

P0263 is an [OBD-II diagnostic trouble code] which indicates that the engine control module (ECM) detected the cylinder number 1 having low contribution to the running of the engine; low power.

What causes the P0263 code?

  • The number one cylinder injector is not spraying in enough fuel or no fuel at all.

  • The number one injector is open or shorted electrically (other trouble codes would be present).

  • The fuel pressure is low or has low volume due to a clogged fuel filter or defective pump.

  • The compression in number 1 cylinder is low due to rockers, lifters, cam, rings or cylinder head gasket problems.

  • The injector O-ring is leaking compression.

What are the symptoms of the P0263 code?

How does a mechanic diagnose the P0263 code?

  • Scans codes and documents the freeze frame data in order to verify the problem.

  • Clears the engine and ETC codes to verify whether the concern comes back

  • Runs an injector electrical self test

  • Checks the fuel pressure and volume to specifications

  • Performs a crankcase pressure test

  • Checks cylinder compression and repairs as needed

  • Checks the injector O-rings and seals then replaces the injector if needed

Common mistakes when diagnosing the P0263 code?

  • Failing to verify the code returns after scanning and deleting code
  • Failing to check fuel pressure volume during diagnosis before replacing injector

How serious is the P0263 code?

A misfiring cylinder can cause the engine to run lean on the failed cylinder if it is an injector and cause the engine to blow black smoke if it has low compression in the cylinder.

What repairs can fix the P0263 code?

  • Replacing the injector and injector seals
  • Replacing the fuel filter and fuel pump
  • Repairing the engine for low compression in the cylinder

Additional comments for consideration regarding the P0263 code

Code P0263 is triggered when the crankshaft sensor does not get an acceleration of the crankshaft from cylinder number 1 power stroke indicating that the cylinder is not contributing to engine power. The injector could also be shorted or open and will cause additional codes that would go with the code P0263 pointing to the injection failure.

Need help with a P0263 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.

P0263
trouble codes
Check Engine Light

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0263 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,696

Rating Summary
3,372
162
42
24
96
3,372
162
42
24
96

Kenneth

17 years of experience
374 reviews
Kenneth
17 years of experience
Great service
2002 MAZDA PROTEGE5 - CHECK ENGINE LIGHT IS ON - ALHAMBRA, CALIFORNIA

Joseph

30 years of experience
432 reviews
Joseph
30 years of experience
As always, excellent job.
2008 LINCOLN NAVIGATOR - CHECK ENGINE LIGHT IS ON - ALLEN, TEXAS

Patrick

30 years of experience
865 reviews
Patrick
30 years of experience
2004 INFINITI G35 - CHECK ENGINE LIGHT IS ON INSPECTION - AUSTIN, TEXAS

Eric

12 years of experience
86 reviews
Eric
12 years of experience
Showed up on time and was extremely helpful
2006 TOYOTA HIGHLANDER - CHECK ENGINE LIGHT IS ON - WASHINGTON, DISTRICT OF COLUMBIA

More related articles

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...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
Auto Safety Tips
Driving is more than a way to get from point A to point B. Owning and driving a car can also be a highly enjoyable experience. Whether a person is driving...

Related questions

Q: My engine is running too lean

Hi there. The high octane gas should not cause this; the new air intake definitely could, though. With more air entering the engine, the computer sensor readings are going to be thrown off. I would recommend that you first make...

Q: Just got code P0430. How long till catalytic converter fails completely?

Hi, thanks for writing in. This P0430 code is for the bank B or driver side converter or the O2 sensor after the converter. The code will need to be diagnosed to isolate the problem to the sensor or the...

Q: Will a bad O2 sensor damage my car's computer?

The engine control unit (ECU) is a possible cause of the O2 sensor fault codes but not the most likely. Your vehicle is equipped with 4 O2 sensors. Bank 1 is the driver's side. Bank 2 is the passenger side....

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com