Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer detected a problem with the electrical signal in the ignition system for cylinder number 10. It's like a hiccup in the way the car's engine is supposed to start and run.
The P133C code indicates a high voltage or current issue in the control line for the ignition system of cylinder 10, affecting the ionic current control module.
The ionic current control module monitors the electrical activity in the ignition system to ensure proper combustion. When the control line for cylinder 10 registers a higher than expected voltage, it triggers the P133C code. This could be due to wiring issues, a faulty module, or a problem with the ignition coil.
• Engine misfires
• Rough idling
• Check Engine Light illuminated
• Faulty ignition coil for cylinder 10
• Wiring issues or short circuits in the control line
• Defective ionic current control module
Ionic Current: A measure of the electrical charge passing through the ignition system.
Ignition Coil: A component that transforms the battery's voltage to a higher voltage to ignite the fuel.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for cylinder 10's ignition system.
• Test the ignition coil for cylinder 10.
• Replace the faulty ignition coil.
• Repair or replace damaged wiring.
• Replace the ionic current control module if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $500
Moderate
• BMW 7 Series
• Mercedes-Benz S-Class
• Audi A8
• Regularly inspect ignition system components.
• Ensure wiring is secure and undamaged.
• Perform routine engine maintenance.
Engine Performance
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle if it is misfiring severely.
Check with the vehicle manufacturer for warranty coverage on ignition system components.
This code has been associated with high-performance vehicles that utilize advanced ignition systems.
Moderate – Address the issue soon to prevent further engine damage.
Driving with a misfiring engine can lead to increased emissions and potential engine damage.
• Engine running
• Vehicle at operating temperature
The ionic current control module is typically located near the engine, connected to the ignition coils.
Q: Can I drive with a P133C code?
A: It's not recommended to drive with a P133C code as it can lead to engine damage and increased emissions.
Q: How can I prevent this code from occurring?
A: Regular maintenance and inspection of the ignition system can help prevent this 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.