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 has detected a problem with a sensor that measures electricity in a part of the car that helps start the engine. It's like the car is saying, 'I can't read how much power is going through this wire!'
The vehicle's control module has detected a low voltage signal from the current sensor in the high voltage starter generator circuit.
The P1E12 code indicates that the Powertrain Control Module (PCM) has detected a low voltage signal from the Phase W current sensor in the high voltage starter generator circuit. This sensor is responsible for monitoring the current flow in one of the phases of the starter generator, which is critical for the proper operation of hybrid or electric vehicles.
• Check Engine Light illuminated
• Reduced fuel efficiency
• Possible stalling or hesitation during acceleration
• Faulty current sensor
• Damaged wiring or connectors
• Faulty Powertrain Control Module (PCM)
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the current sensor for proper operation.
• Replace the faulty current sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Chevrolet Volt
• Toyota Prius
• Nissan Leaf
• Regular maintenance checks
• Ensure wiring is intact and secure
• Avoid exposure to extreme temperatures
Sensor Issue
• Avoid driving the vehicle until repaired to prevent further damage.
• Consult with a professional mechanic for accurate diagnosis.
Check with the vehicle manufacturer for warranty coverage on hybrid system components.
This code is commonly associated with hybrid and electric vehicles due to their reliance on high voltage systems.
Moderate – It is advised to address this issue soon to avoid potential damage to the vehicle's electrical system.
Driving with this code may lead to reduced vehicle performance and potential safety hazards.
• Vehicle at operating temperature
• Engine running
The current sensor is typically located near the high voltage starter generator, often within the engine bay.
Q: Can I drive my car with a P1E12 code?
A: It's not recommended to drive with this code as it may lead to further damage.
Q: What happens if I ignore the P1E12 code?
A: Ignoring this code can result in reduced performance and potential damage to the vehicle's electrical system.
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