Cost of Ignition Coil Service for Cylinder 2 No Spark

You just scanned your check engine light and got a P0302 code cylinder 2 misfire, no spark. Maybe your engine is shaking at idle, or you've noticed a serious drop in fuel economy. Now you're wondering what this repair is actually going to cost you. That's a smart question to ask before heading to a shop, because the price for ignition coil service on cylinder 2 can range widely depending on your vehicle, where you go, and what exactly needs replacing.

What Does "Cylinder 2 No Spark" Actually Mean?

Your engine's ignition coil converts low-voltage battery power into the high-voltage spark needed to ignite the air-fuel mixture inside each cylinder. When cylinder 2 loses that spark, the fuel in that cylinder doesn't burn. This leads to rough idling, hesitation during acceleration, poor gas mileage, and potential damage to your catalytic converter if left unaddressed.

A "no spark" condition on cylinder 2 specifically points to a problem in that cylinder's ignition circuit. This could be a failed coil pack, a bad spark plug, a damaged boot or wire, or even an electrical issue like a faulty connector or driver circuit in the engine control module. The diagnosis matters because it directly affects the cost replacing a coil when the real problem is a corroded connector wastes money.

How Much Does Ignition Coil Service for Cylinder 2 Cost?

Here's a general breakdown based on typical shop pricing across the U.S. as of 2024:

Diagnostic scan and inspection: $80–$150. Most shops charge a diagnostic fee to confirm the misfire source and rule out other causes.
Single ignition coil replacement: $150–$350 total (parts and labor). Coil packs range from $30–$150 depending on vehicle make, and labor typically takes 0.5–1 hour.
Spark plug and boot inspection or replacement: $100–$250. If the spark plug is fouled or the boot is cracked, those need to go too.
Full coil pack set replacement (all cylinders): $300–$700+. Some mechanics recommend replacing all coils at once if one has failed, especially on high-mileage vehicles.

If you drive a common vehicle like a Toyota Camry, Honda Civic, or Ford F-150, parts are widely available and costs stay on the lower end. Luxury or European vehicles like BMW, Audi, or Mercedes tend to run higher because of pricier OEM parts and more complex labor.

Should You Replace Just the Cylinder 2 Coil or All of Them?

This is one of the most common questions people have, and there's no single right answer. If your car has relatively low mileage (under 80,000 miles) and only cylinder 2's coil has failed, replacing just that one coil is perfectly reasonable. But if your vehicle has 100,000+ miles, the other coils are likely near the end of their life too. Replacing them all at once saves on future labor costs and prevents you from coming back a few months later with the same problem on a different cylinder.

A practical approach that many experienced mechanics recommend: replace the single failed coil and spark plug on cylinder 2, then inspect the spark plugs and boots on the remaining cylinders while you're at it. If they look worn, replace them all in one visit.

What Are Common Mistakes That Drive Up the Cost?

People often spend more than necessary because of a few predictable errors:

Replacing the coil without checking the spark plug first. A fouled or worn spark plug can cause the exact same P0302 code. If you swap the coil but leave a bad plug in, the misfire won't go away, and you'll be back at the shop paying for more diagnostics.
Not swapping coils to confirm the diagnosis. A quick way to verify the coil is the problem is to swap the cylinder 2 coil with another cylinder and see if the misfire follows. This is free and takes five minutes.
Ignoring the boot and connector. The rubber boot that connects the coil to the spark plug can crack, tear, or collect moisture. A damaged boot can arc and cause misfires even with a brand-new coil. Following proper diagnosis steps before replacing parts prevents this oversight.
Using cheap aftermarket coils. A bargain-bin coil pack from an unknown brand might work for a month or two, then fail again. Stick with OEM or reputable brands like Delphi, Bosch, Denso, or Standard Motor Products.

Can You Replace the Ignition Coil Yourself?

On most four-cylinder and many six-cylinder engines, the ignition coils sit right on top of the spark plugs and are held in by a single bolt. If you can use a socket wrench, you can usually swap a coil in under 30 minutes. Here's what the basic process looks like:

Disconnect the negative battery terminal.
Locate cylinder 2 (check your owner's manual or an online diagram for your specific engine cylinders aren't always numbered intuitively).
Unplug the electrical connector from the coil.
Remove the bolt holding the coil in place.
Pull the coil straight up and out.
Inspect the spark plug and boot while you have access.
Install the new coil, reconnect the connector, and bolt it down.
Reconnect the battery and clear the code with an OBD-II scanner.

A single coil costs $30–$100 at most auto parts stores. That means a DIY repair could save you $100–$200 in labor compared to a shop. The full cost picture including spark plug and boot inspection helps you decide if doing it yourself makes sense for your situation.

What If the New Coil Doesn't Fix the Problem?

Sometimes you replace the coil and the misfire persists. This usually means the root cause wasn't the coil itself. Common culprits that mimic a bad coil include:

A cracked or fouled spark plug
A damaged spark plug wire or boot
Low compression in cylinder 2 (head gasket leak, worn piston rings, or valve issue)
A faulty fuel injector on cylinder 2
An electrical issue in the coil driver circuit or wiring harness

If a new coil and plug don't resolve the P0302 code, the next step is a compression test and a check of the fuel injector. These tests add $100–$300 to the bill but are necessary to avoid throwing more parts at the problem blindly.

How to Save Money on This Repair

Get the diagnostic code yourself first. A basic OBD-II scanner costs $20–$30 and tells you the exact code before you visit a shop. This helps you have an informed conversation with the mechanic.
Ask for the old parts back. Reputable shops will show you the failed coil and plug. This confirms the diagnosis was legitimate.
Compare quotes from at least two shops. Dealer prices for this service are often 40–60% higher than independent mechanics. For a straightforward coil replacement, an independent shop handles it just as well.
Buy your own parts. Some shops let you bring your own parts (though they may not warranty the labor). OEM-quality coils from a parts store often cost half of what a dealer charges for the same part.

Quick Checklist Before You Approve the Repair

Confirm the shop scanned for codes and identified P0302 specifically.
Ask if they performed a coil swap test to verify the coil is the failed component.
Request that they inspect the spark plug and boot on cylinder 2 during the repair.
Get a written estimate that separates parts and labor costs.
Ask whether they recommend replacing all coils or just cylinder 2, and why.
Verify the warranty on parts and labor before work begins.

A cylinder 2 misfire from a failed ignition coil is one of the more straightforward and affordable engine repairs usually between $150 and $350. The key is confirming the diagnosis is right before spending money on parts. A few minutes of checking the spark plug and swapping the coil to test can save you from an unnecessary bill.