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 saying that the power going to one of the electric motor's control systems is too high, like when a toy gets too much battery power.
This code indicates that the voltage in the 15V power supply circuit for the drive motor 'B' control module is higher than expected.
The P1A33 code is triggered when the Powertrain Control Module (PCM) detects a voltage level that is higher than the specified range in the 15V power supply circuit of the drive motor 'B' control module. This could indicate an issue with the voltage regulator or a problem in the wiring or connectors.
• Check Engine Light is on
• Reduced vehicle performance
• Possible electric motor malfunction
• Faulty voltage regulator
• Damaged wiring or connectors
• Faulty drive motor 'B' control module
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connectors for damage
• Test the voltage regulator for proper operation
• Repair or replace damaged wiring or connectors
• Replace the faulty voltage regulator
• Replace the drive motor 'B' control module if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $800
Moderate
• Chevrolet Volt
• Toyota Prius
• Nissan Leaf
• Regular maintenance checks
• Ensure proper electrical connections
• Avoid overloading the electrical system
Electrical Circuit Issue
• Avoid driving the vehicle aggressively until repaired
• Consult a professional mechanic if unsure about repairs
Check with the vehicle manufacturer for specific warranty coverage related to electrical components.
This code has been reported in hybrid and electric vehicles, often related to issues with the electrical supply to the motor control modules.
Moderate – It is advisable to address this issue soon to avoid potential damage to the vehicle's electric motor system.
Driving with this code active may lead to reduced vehicle performance and should be addressed to ensure safety and compliance with emissions regulations.
• Vehicle in 'ON' position
• Use of diagnostic scanner
The drive motor 'B' control module is typically located near the vehicle's electric motor or within the powertrain control module housing.
Q: Can I drive my car with a P1A33 code?
A: It's not recommended as it may lead to reduced performance and potential damage to the electric motor system.
Q: How can I reset the P1A33 code?
A: After repairs, you can use an OBD-II scanner to clear the code, but it will return if the underlying issue is not fixed.
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