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 is having trouble talking to one of the parts that helps the engine start and run. It's like when a walkie-talkie isn't working well, and you can't hear your friend clearly.
The P035B code indicates a problem with the electrical circuit that controls the ignition coil for cylinder E. This can affect the engine's ability to start and run smoothly.
The P035B code is triggered when the Engine Control Module (ECM) detects a low voltage condition in the ignition control circuit for coil E. This could be due to a short or open circuit, faulty coil, or issues with the ECM itself.
• Engine misfire
• Rough idle
• Check Engine Light illuminated
• Reduced engine performance
• Faulty ignition coil
• Open or shorted wiring in the ignition circuit
• Poor electrical connection
• Faulty ECM
ECM: Engine Control Module
Ignition Coil: A component that converts the battery's voltage to a higher voltage to ignite the fuel-air mixture in the engine.
• Use an OBD-II scanner to confirm the code.
• Inspect the ignition coil and related wiring for damage.
• Test the ignition coil with a multimeter.
• Check the ECM for faults.
• Replace the faulty ignition coil.
• Repair or replace damaged wiring.
• Ensure all electrical connections are secure.
• Replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance checks
• Timely replacement of ignition components
• Keeping electrical connections clean
Engine Performance
• Have your vehicle inspected by a professional mechanic.
• Avoid driving long distances until the issue is resolved.
Check with your vehicle's manufacturer for warranty coverage on ignition components.
This code has been associated with ignition system issues in various vehicles, often related to coil or wiring problems.
Moderate – It's important to address this 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 ignition coil is typically located on top of the engine, connected to the spark plugs.
Q: Can I drive with a P035B code?
A: It's not recommended to drive for long periods with this code, as it can lead to engine damage.
Q: What happens if I ignore the P035B code?
A: Ignoring this code can result in poor engine performance and potential damage to the catalytic converter.
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.
View on Amazon
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.
View on Amazon
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.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.
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.