Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is having trouble understanding signals from the engine because something is wrong with the wires or sensors that help it 'hear' the engine properly.
The code P1370 indicates that the vehicle's computer has detected a low signal in the ionic current signal amplification control circuit for bank 1.
The P1370 code is triggered when the Engine Control Module (ECM) detects a low signal in the ionic current signal amplification control circuit for bank 1. This circuit is responsible for monitoring the ionic current in the combustion chamber, which helps in detecting misfires and optimizing ignition timing.
• Check Engine Light is on
• Engine misfires
• Poor engine performance
• Faulty ionic current sensor
• Damaged wiring or connectors
• Faulty Engine Control Module (ECM)
ECM: Engine Control Module
Ionic Current: An electrical current used to monitor combustion quality in the engine
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the ionic current sensor for proper operation.
• Replace or repair damaged wiring or connectors.
• Replace the ionic current sensor if faulty.
• Reprogram or replace the ECM if needed.
• OBD-II scanner
• Multimeter
• Screwdriver set
$150 - $500
Moderate
• Saab 9-3
• Saab 9-5
• Chevrolet Malibu
• Regular maintenance checks
• Ensure connectors and wiring are secure
• Use quality fuel to prevent sensor contamination
Sensor Issue
• Get the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle if experiencing severe misfires.
Check with the vehicle manufacturer for specific warranty coverage on emission-related components.
This code is more common in vehicles with advanced ignition systems that use ionic current detection for combustion monitoring.
Moderate – It should be addressed soon to prevent further engine issues.
Ignoring this code may lead to increased emissions and potential damage to the catalytic converter.
• Engine at operating temperature
• Vehicle stationary with the engine idling
The ionic current sensor is typically located near the ignition coils on the engine.
Q: Can I drive my car with a P1370 code?
A: It's not recommended to drive for long periods as it may cause further engine damage.
Q: What happens if I ignore this code?
A: Ignoring the code can lead to poor engine performance and potential damage to the catalytic converter.
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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.