Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the part of the car that checks how well one of the cylinders in the engine is working. It's like a sensor that tells if the engine is firing correctly.
The engine control module (ECM) detects an issue with the ion current sensing circuit for cylinder 11, which affects the engine's performance monitoring.
The ion current sensing circuit is used to monitor the combustion process within the cylinder by measuring the ionization current. This helps the ECM optimize the ignition timing and fuel injection. A range/performance issue indicates that the signal is not within the expected parameters, which could affect engine efficiency and emissions.
• Check Engine Light (CEL) is on
• Poor engine performance
• Increased fuel consumption
• Faulty ion current sensor
• Wiring issues in the sensor circuit
• ECM malfunction
ECM: Engine Control Module
Ion Current: A measure of the ionization in the cylinder during combustion
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connections to the ion current sensor
• Test the ion current sensor with a multimeter
• Replace the faulty ion current sensor
• Repair or replace damaged wiring
• Reprogram or replace the ECM if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• BMW 7 Series
• Mercedes-Benz S-Class
• Audi A8
• Regular maintenance checks
• Ensure proper electrical connections
• Use high-quality fuel
Sensor Issue
• Do not ignore the Check Engine Light
• Seek professional diagnosis if unsure
• Monitor fuel efficiency for changes
Check with the vehicle manufacturer for warranty coverage on sensors and ECM.
This code is relatively rare and typically associated with high-performance or luxury vehicles with advanced engine management systems.
Moderate – Should be addressed to prevent long-term engine performance issues.
Driving with a malfunctioning engine sensor can lead to increased emissions and potential safety risks.
• Engine at operating temperature
• Vehicle in a stationary position
The ion current sensor is typically located on or near the ignition coil of cylinder 11.
Q: Can I drive with this code?
A: It's not recommended as it may lead to poor engine performance and increased emissions.
Q: Is this an expensive repair?
A: The cost can vary, but it generally ranges from $150 to $500 depending on the vehicle and the specific issue.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.