2018 Honda Civic · symptom sheet
Check engine light or misfire
- 26owner reports
- 98,000median miles
- 0involved a crash
Newest report Jun 16, 2026 · checked Oct 2, 2026
269 of the 742 complaints on this car are about the engine. 26 of those describe misfire.
Tick what matches of 26 reports
Misfire on other Civic years
No other Civic model year has enough reports of misfire for a sheet of its own. See every Civic year.
What this problem usually is
These reports start with the check engine light. Many describe the engine running rough or shaking at idle, a P0300-series code, or a catalytic converter code. A worrying number say the light was flashing. Owners often list ignition coils or spark plugs already replaced, and the light coming back afterward.
What got replaced
Owners who name the part that was replaced mention the injectors (8 reports).
Recalls and investigations
2 recalls on the engine cover the 2018 model year. A recall on the same system isn't always the same failure, so read the defect text.
The fuel pump inside the fuel tank may fail.
The low-pressure fuel pump inside the fuel tank may fail.
All 6 recalls on the 2018 Honda Civic, with the owner complaints on each recalled system
NHTSA investigations into the engine on the Civic
Low beam headlights stop illuminating. Closed sep 17, 2012, led to recall 12V-136.
Ignition shift interlock. Closed oct 14, 2010, led to recall 10V-364.
Cng tank exploding in a fire. Closed nov 20, 2007.
Ignition distributor. Closed oct 25, 2001.
Stalling. Closed jan 31, 1994.
None of these investigations covers the 2018 model year.
When it happens
The middle half of failures fell between 36,000 and 116,995 miles, from the 13 reports that gave a mileage.
Is this a known problem?
The manufacturer has sent NHTSA 5 service bulletins or notices for the 2018 Honda Civic that deal with this problem. Newest first.
Federal rules make a manufacturer send NHTSA a copy of any notice about a defect that goes to more than one dealer or owner. Most of these are service bulletins, the repair instructions manufacturers send to dealers. NHTSA generally leaves safety recall bulletins out of this file, and recalls are listed separately.
Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire and/or DTCs P0300 thru P0304 stored.
This bulletin is replaced by S/B 19-033, Warranty Extension: 2016-18 Civic 1.5L: Software Update with A/C Control Unit Replacement; DTC P0300, P0301, P0302, P0303, P0304, or P0172; Whirling Noise from Engine.
Under certain circumstances, the vehicle may experience driveability issues, which may result in DTCs P0300 (random misfire detected), P0301 (No. 1 cylinder misfire detected), P0302 (No. 2 cylinder misfire detected), P0303 (No. 3 cylinder misfire detected), ...
American Honda Motor Co., Inc. (AHM) is searching for certain 2018-2021 Accord 1.5Ts, Civic Sis & CR-Vs with a customer complaint of the Malfunction Indicator Light (MIL) on with the DTC P030X (Cylinder Misfire Detected) or P0172 (Fuel System Too Rich) ...
1 more on the 2018 Honda Civic page.
What owners wrote
“P0302 Cylinder 2 Misfire Detected, diagnosis concluded fuel injector is faulty, the rest are to follow the same path. Vehicle hesitation happened during highway traffic driving.”
Filed Aug 26, 2025
“Multiple misfires and rich fuel codes. Car losses acceleration at high speeds creating safety issue. Faulty fuel injectors. No current recall. Vehicle goes into limp mode.”
Filed Jul 9, 2024
“Headgasket problem Fuel injector Problem Head bolt problem Engine enters limb mode when cold start due to head gasket leak Misfire on multiple cylinders due to fuel injector failure.”
Filed Jun 14, 2024
“Fuel injectors are failing in my 2018 Honda civic si, causing my short term fuel trim to set at -25 triggering check engine light. This disables multiple functions of the car. And looking for parts a found out that fuel injectors are out of stock.”
Filed Mar 31, 2024
Should you keep driving it?
This page can't tell you that. 0 of 26 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.
File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.
Guide Which lights mean pull over now? Warning lights by color and urgency
Other problems on this car
- Steering sticks, feels notchy or jerks 239 reports
- A/C blows warm or the compressor fails 102 reports
- Power steering cuts out or goes heavy 76 reports
- Engine stalls or loses power while driving 54 reports
- Fuel pump failure 36 reports