Is your car suddenly playing hard to get?
Don’t let a failing ignition module leave you stranded.
From mysterious misfires to complete shutdowns, this little part can cause big headaches. But the cost of replacing it shouldn’t blow a fuse in your budget.
We’ll break down the ignition control module (ICM) replacement cost and explain why it is crucial to replace it before you’re stuck in the slow lane.
This Article Contains:
- How Much Does the Ignition Module Cost?
- Is It Worth Replacing Your Car’s Ignition Module?
- 4 Telltale Signs of a Faulty Ignition Module
- How to Diagnose a Faulty Ignition Control Module?
- How Long Does an Ignition Module Last?
- How Does the Ignition Control Module Work?
How Much Does the Ignition Module Cost?
Here’s a breakdown of how much you’ll have to shell out for a new ignition module:
A. Range
On average, expect to pay anywhere between $315 and $430 for a new ignition control module. This includes:
- Parts price: $50 to $500
- Labor costs: $70 to $170, varies depending on your location, taxes, and the establishment where you get the replacement
B. Factors Affecting Cost
The accurate estimate for a new ignition module will depend on the following:
- Vehicle make and model: Replacing the ignition module on luxury or high-performance vehicles often incurs higher part price and labor costs.
- Part availability: If you own an older or less common vehicle model, parts may be harder to find and more expensive.
- Location of the module: The exact location of the ignition control module can vary per vehicle manufacturer. On some vehicles, it can be located under or near the intake manifold, making it difficult to access. This can push up the labor charges.
- OEM vs. aftermarket parts: Original Equipment Manufacturer (OEM) parts come at a higher price but are often more reliable. Aftermarket parts can be cheaper but may vary in quality.
- Pre-diagnosis: The auto repair shop may charge an extra flat fee for running a thorough diagnosis to confirm a faulty ignition control module.
- Additional repairs: Auto mechanics may suggest some extra repairs depending on the condition of related internal components and the underlying issues in the ignition system. These could include fixing the ignition coil, spark plug wires, ignition switch, distributor cap, etc.
Is It Worth Replacing Your Car’s Ignition Module?
Short answer: Yes!
The ignition module is vital to your car’s ignition system, and if it fails, you may experience engine misfires, stalling, or even a complete failure to start. Continuing to drive with a bad ICM can also damage your catalytic converter, leading to more severe and costly issues down the line.
Bottom line: Replacing the ICM not only improves your car’s safety but also helps prevent further damage.
4 Telltale Signs of a Faulty Ignition Module
Here are some symptoms that can point to a failing ignition module:
- Active Check Engine Light: Any issue with the ignition system will trigger the Check Engine Light on your dash, and the car’s computer will register a related trouble code, such as P0300 or P0399.
- Vehicle stalling: A faulty module can cause stalling as it will prevent the engine from getting the spark needed for ignition.
- Engine misfires or runs rough: An engine misfire typically indicates incomplete combustion, and a rough-running engine is another sign of the same issue. If your ICM is faulty, you might also experience difficulty with acceleration.
- Your car won’t start: If your vehicle won’t start and you hear no response when turning the key, it might be due to a failing ICM.
How to Diagnose a Faulty Ignition Control Module?
Diagnosing a faulty ignition module is tricky and is best left to professional mechanics.
Note: Ignition-related components like a faulty spark plug, damaged spark plug wires, worn ignition coils, etc., are often misdiagnosed for a defective ignition module. So, a mechanic will inspect these parts first and replace them before checking the ignition module.
If other parts are working fine, here’s how they would go about testing the ignition module:
Step 1: Visual Inspection
The mechanic will start by inspecting the ignition module for visible damage, such as cracks, corrosion, or burnt wiring. They’ll also ensure that the connectors are clean and secure.
Step 2: Test the Ignition Coils
They’ll remove a spark plug wire and use a spark tester to check for sparks while cranking the engine. If there is no spark, the ICM might be faulty.
Next, they’ll measure the resistance of the ignition coils with a multimeter. If the resistance is out of spec, it could indicate a bad ICM or coil.
Step 3: Test the Module Voltage
They’ll proceed to check the module voltage using a multimeter.
- ICM voltage test: They’ll disconnect the ICM and turn the ignition key to the “ON” position. Then, use a multimeter to check the voltage at the ICM’s power and ground terminals. They’ll compare the readings with the information in your owner’s manual. Incorrect readings may indicate a faulty ICM.
- Output signal test: They’ll reconnect the ICM and check the output signal from the ICM while cranking the engine. A weak or no signal indicates a faulty ICM.
How Long Does an Ignition Module Last?
An ignition control module can last up to 100,000 miles, but it may wear out sooner due to extreme temperatures, electrical issues, or general wear and tear.
Regular vehicle maintenance and immediate attention to any signs of failure, like engine misfires or starting problems, can help extend the life of the ICM.
How Does the Ignition Control Module Work?
The ignition module controls the timing and firing of the spark plugs in your engine. It receives information in the form of signals from the engine’s sensors, like the crankshaft position sensor, to determine the precise timing for firing the spark plugs.
The ICM then sends an electrical current to the ignition coil, which amplifies the voltage and sends it to the spark plug set. This controlled spark ignites the air-fuel mixture in the engine cylinders to power the engine.
Maintain a Reliable Ignition System with AutoNation Mobile Service
Investing in a timely ignition module replacement can save you from costly repairs and keep your vehicle running smoothly.
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We’re a mobile car repair and maintenance solution available seven days a week. For extra peace of mind, we offer a 12-month, 12,000-mile warranty on all repairs.
Contact us to get your car back on the road in no time.