Ignition Coil A Primary Control Circuit High
The P2301 code means the vehicle's onboard diagnostic system has detected: Ignition Coil A Primary Control Circuit High. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $50 - $300 (parts and labor)
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What Are the Symptoms of P2301?
- Engine misfire on cylinder associated with coil A
- Check Engine Light illuminated or flashing
- Rough running engine
- Loss of power during acceleration
- Increased exhaust emissions
What Causes P2301? (Most Likely First)
- Short circuit in ignition coil A wiring Very High
- Failed ignition coil A (shorted internally) High
- Damaged coil A connector with shorted pins Moderate
- ECM coil driver transistor failure Low
Can I Still Drive with P2301?
Short distances only. P2301 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
Can I drive with code P2301?
Short distances only. Continued misfiring can overheat and damage the catalytic converter. Do not ignore a flashing Check Engine Light.
What causes P2301?
Usually a failed ignition coil or shorted wiring. The coil swap test is the fastest way to confirm whether the coil itself is the problem.
Is P2301 expensive to fix?
Typically $50 to $300. Ignition coil replacement is one of the more affordable engine repairs.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2301?
-
Swap coil A with another cylinder coil to confirm the coil is at fault
-
Check coil connector pins for shorts between terminals
-
Measure primary coil resistance and compare to specification
-
Inspect wiring for chafing or melted insulation near exhaust heat
-
Test the ECM coil driver output with a noid light
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Which Vehicles Commonly Get P2301?
- 2010-2018 Toyota Camry V6
- 2012-2020 Honda Accord V6
- 2011-2019 Ford Edge V6
- 2013-2021 Nissan Maxima V6
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