Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means there's a problem with the electrical connection that helps control the spark in one of the car's cylinders. It's like a broken wire that stops a light bulb from turning on.
The code indicates an open circuit in the control line for the ionic current control module, specifically affecting ignition cylinder 2.
The P133E code is triggered when the Engine Control Module (ECM) detects an open circuit in the ionic current control module's control line for ignition cylinder 2. This module monitors the ionic current generated during combustion to optimize ignition timing and detect misfires.
• Check Engine Light illuminated
• Engine misfires
• Reduced engine performance
• Damaged wiring or connectors in the control line
• Faulty ionic current control module
• Defective ignition coil for cylinder 2
Ionic Current: An electrical current generated during combustion, used to monitor and optimize engine performance.
Open Circuit: A break in the electrical circuit that prevents current from flowing.
• Perform a visual inspection of the wiring and connectors for damage.
• Use a multimeter to check for continuity in the control line circuit.
• Test the ignition coil for cylinder 2 for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the ionic current control module if found faulty.
• Replace the ignition coil for cylinder 2 if necessary.
• Multimeter
• OBD-II scanner
• Basic hand tools
$150 - $400
Moderate
• BMW 3 Series
• BMW 5 Series
• Mini Cooper
• Regularly inspect and maintain ignition system components.
• Ensure proper electrical connections and wiring integrity.
• Schedule routine vehicle diagnostics.
Engine Performance
• Do not ignore the Check Engine Light; have it diagnosed promptly.
• Avoid driving the vehicle aggressively until the issue is resolved.
Check your vehicle's warranty for coverage on ignition system components.
This code has been associated with issues in vehicles using advanced ignition systems that monitor ionic currents for optimal performance.
Moderate – While the vehicle may still be drivable, it can lead to further engine performance issues if not addressed.
Driving with a malfunctioning ignition system can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Stable idle conditions
The ionic current control module is typically located near the ignition coils, often mounted on or near the engine.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to engine misfires and reduced performance, potentially causing more severe engine damage over time.
Q: Can I fix this issue myself?
A: If you have experience with vehicle electronics and the necessary tools, you might be able to fix it. Otherwise, it's best to consult a professional mechanic.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
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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.
View options on Amazon
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.