Honda Civic Si Problems

RepairPal has identified the most common problems with the Honda Civic Si as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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Known Problems
On the HX model, the Powertrain Control Module (PCM) can misinterpret oxygen sensor data and set a false Check Engine light (MIL). A software update from Honda is needed for this issue.
On certain models the Powertrain Control Module (PCM) misinterprets coolant temperature data and can turn on the Check Engine light (MIL). A software update from Honda is needed to address this issue.
On some models Powertrain Control Module (PCM) response time for idle speed and engine timing can cause the engine to stall. A software update from Honda is required to fix this problem.

On some engines a sticking variable valve timing valve can cause  the Check Engine light (MIL) to illuminate. Replacing the valve and a software update will address this issue.

A failure of the Primary O2 sensor heater can cause illumination for the Check Engine Light. Replacing the O2 is required to repair this issue.

Primary oxygen sensor heater failures can cause a Check Engine light. Replacing the sensor is required to repair this issue.
Cracked exhaust is common on both exhaust manifolds and manifold/catalytic converter combination. Replacing the cracked component will repair the problem.

A faulty brake master cylinder reservoir filter can cause the brake system indicator to illuminate after a cold start and then go off. Replacement of the reservoir filter will commonly fix this problem.

Certain models can have a crowned rear brake drum that can cause a vibration when braking. The rear drums will have to be replaced to correct this issue.

The front brake rotors can warp and cause a vibration when braking. The rotors will need to be machined or in cases where they are worn to thin, replaced to correct this issue.

On certain models the automatic transmission range switch can fail and cause the Check Engine light (MIL) to illuminate, and the engine may not crank intermittently. Replacing the range switch is needed for this repair.
Excessive second clutch wear (automatic transmission) can cause the car not to move and set a Check Engine light (MIL). Replacing the transmission is necessary when this happens.

A fluid leak may develop from one or both front suspension struts. Replacing the struts (usually in pairs) will be necessary to take care of the problem.

A refrigerant leak may develop from the AC evaporator causing the AC to blow warm air. Verifying failure of this component is difficult. A good shop will use leak detection dye to verify a failing evaporator.

On certain models the drivers seat bushings can wear out and the seat can rock back and forth. Replacing the bushings are needed to repair this issue.