Ignition Coil B Secondary Circuit Range/Performance
The P2341 code means the vehicle's onboard diagnostic system has detected: Ignition Coil B Secondary Circuit Range/Performance. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $150 - $425 (parts and labor)
Best-selling code reader on Amazon. Reads and clears check engine codes on any 1996+ vehicle. Under $30.
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
Essential for diagnosing sensor codes, checking voltage, and testing circuits. Under $15 and pays for itself on the first job.
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
Common Symptoms
- Check Engine Light illuminated
- Intermittent misfire on cylinder 2
- Slight rough idle that may come and go
- Minor hesitation under heavy acceleration
- Marginally increased fuel consumption
Probable Causes (Ranked by Likelihood)
- Degraded ignition coil B with weak spark output Very High
- Worn spark plug with excessive gap on cylinder 2 High
- High resistance in spark plug wire or coil boot Moderate
- Compression issue on the affected cylinder Low
Step-by-Step Diagnostic Procedure
-
Scan for P2341 and review misfire history and freeze frame conditions
-
Compare ignition coil B secondary output with other coils using a spark tester
-
Inspect and replace spark plug on cylinder 2 if worn beyond specification
-
Perform a relative compression test to rule out mechanical issues on cylinder 2
Frequently Asked Questions
What does P2341 mean?
P2341 means ignition coil B on cylinder 2 is producing spark that falls outside the expected performance range. The coil may be weakening but not fully failed.
Can I drive with P2341?
Yes, for short distances. The misfire may be intermittent, but continued driving can worsen the coil condition and damage the catalytic converter over time.
How much does it cost to fix P2341?
Costs typically range from $150 to $425, depending on whether the coil, spark plug, or both need replacement.
Sources
This page is built from documented references. Verify against your own service info before repair work.
P2341 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
Explore More
Was this helpful?
Share carcodefinder.com with a friend who needs to decode their check engine light.