P0273 — Cylinder 5 Injector A Circuit Low

What Does P0273 Mean?

P0273 is a diagnostic trouble code indicating: Cylinder 5 Injector A Circuit Low. This code relates to the fuel injection system. It has been reported in NHTSA complaints across 1 different vehicle models.

Symptoms of P0273

⚠️ Engine misfires

Common Causes

🔍 Worn or fouled spark plugs
🔍 Failed ignition coil
🔍 Clogged or leaking fuel injector
🔍 Wiring or connector problem

Real Owner Reports

From NHTSA complaint database — actual owner descriptions.

"DURING ALL OF THE 5 INCIDENTS IN 2009 THE ENGINE MISFIRED VIOLENTLY. AT TIMES 35MPH WAS MAX SPEED. CRONIN KIA HAD MY VEHICLE OVER 30 DAYS IN 5 VISITS IN 2009. THEY HAVE REPLACED; TWO CAT. CONVERTERS, THE IGNITION COIL PACK AND SPARK PLUGS, A LEAKING FUEL INJECTOR AND ASSOCIATED WIRING. PLEASE NOTE"
— Kia Sportage owner, 03/07/2009

Source: NHTSA Complaints Database

Most Reported Vehicles for P0273

Based on NHTSA owner complaint data.

#	Vehicle	Reports
1	KIA SPORTAGE

Frequently Asked Questions

Can I drive with this code?

It depends on the severity. If the vehicle runs normally, short trips are usually OK. If you notice performance issues, drivability problems, or warning lights beyond the check engine light, get it checked soon.

Will this code clear itself?

Some codes clear automatically after the underlying issue is fixed and several drive cycles pass. But the root cause must be addressed first.

How do I find the exact cause?

A code alone doesn't pinpoint the failed part. You need a diagnostic scan ($50-150 at most shops) that reads freeze frame data and live sensor readings to identify the specific component.

What To Do Next

Possible Fixes

🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
🔧 Inspect wiring harness and connectors for damage, corrosion, or loose connections
🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P0273: Cylinder 5 Injector A Circuit Low