What Does P0361 Mean?
The ECM has detected a primary or secondary circuit malfunction in ignition coil K, serving cylinder #11 on engines with eleven or more cylinders. This is an extremely rare code encountered only in exotic multi-cylinder configurations such as W12 engines. The coil is not responding properly to firing commands, and the affected cylinder will misfire continuously.
Common Causes
40%
Failed ignition coil K with internal winding failure from heat cycling in tightly-packaged W12 engine bay
25%
Wiring or connector fault in the coil K circuit due to confined routing and elevated temperatures in W12 applications
20%
Worn or fouled spark plug on cylinder 11 causing excessive coil demand
15%
ECM or secondary control module coil driver failure for cylinder 11
Diagnostic Steps
1
Swap coil K with a known-good coil from another cylinder position. Clear codes and drive until fault resets to determine if the code follows the coil.
2
Measure coil K primary and secondary resistance per manufacturer specification for the W12 application. Compare to other coils.
3
Inspect the coil K connector and wiring harness for heat damage. W12 engines generate significant heat in confined spaces, accelerating insulation breakdown.
4
Remove and inspect the cylinder 11 spark plug. On W12 engines, spark plug access is extremely limited and plugs may not have been serviced on schedule.
5
Verify coil K power supply and ECM trigger signal using appropriate diagnostic equipment for the specific W12 platform.
Estimated Repair Cost
$100 - $500
Parts + labor, varies by vehicle and location
The ECM has detected a primary or secondary circuit malfunction in ignition coil K, serving cylinder #11 on engines with eleven or more cylinders. This is an extremely rare code encountered only in exotic multi-cylinder configurations such as W12 engines. The coil is not responding properly to firin...
The most common cause of P0361 (Ignition Coil K Primary/Secondary Circuit Malfunction) is: Failed ignition coil K with internal winding failure from heat cycling in tightly-packaged W12 engine bay
Typical repair costs for P0361 range from $100 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
A single-cylinder misfire on a W12 engine causes minor power loss but can damage the catalytic converter if left unrepaired. These luxury applications should be serviced promptly to prevent costly secondary damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0361 to identify the root cause.
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Quick Info
Category
Powertrain
System
Ignition System
Difficulty
Type
Generic (SAE)
Recommended Tools
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