P1B0C Saturn Code - Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage
Quick Answer
The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules. Common causes include Faulty Drive Motor 1 Control Module Hybrid/EV Battery, Drive Motor 1 Control Module Hybrid/EV Battery harness is open or shorted, Drive Motor 1 Control Module Hybrid/EV Battery circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1B0C Saturn indicates Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensing Circuit 2 High Voltage.
- Common causes
- Common causes include Faulty Drive Motor 1 Control Module Hybrid/EV Battery, Drive Motor 1 Control Module Hybrid/EV Battery harness is open or shorted, Drive Motor 1 Control Module Hybrid/EV Battery circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1B0C Saturn Description
Motor control module loss of isolation is detected through the use of two high-impedance resistors and voltage measuring circuitry. The two resistors are connected in series between the high- voltage positive and high-voltage negative circuits. The centre connection of the two resistors is also connected to vehicle chassis. The motor control module then measures the voltage drop across one of the resistors. Without a loss of isolation, the motor control module should measure about half of the high voltage potential. This is referred to as mid-pack voltage. The Mid-pack voltage value is then doubled by the software and displayed on a scan tool as Motor 1 Isolation Voltage or Motor 2 Isolation Voltage. When a loss of isolation is present, the motor isolation voltage display will indicate voltage that is more or less than actual hybrid battery high voltage. The motor control module monitors the loss of isolation voltage measuring circuitry for correct operation.
What are the Possible Causes of the DTC P1B0C Saturn?
- Faulty Drive Motor 1 Control Module Hybrid/EV Battery
- Drive Motor 1 Control Module Hybrid/EV Battery harness is open or shorted
- Drive Motor 1 Control Module Hybrid/EV Battery circuit poor electrical connection
How to Fix the DTC P1B0C Saturn?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1B0C Saturn code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1B0C Saturn Code
1. What does the OBDII code P1B0C mean on a Saturn?
The P1B0C code indicates an issue with the Drive Motor 1 Control Module detecting high voltage in the Hybrid Battery Voltage Isolation Sensing Circuit 2.
2. What are the common symptoms of the P1B0C code?
Symptoms may include an illuminated check engine light, reduced hybrid system performance, limited power mode, or failure of the vehicle to operate in EV mode.
3. What causes the P1B0C code to appear on a Saturn?
Common causes include a faulty Drive Motor Control Module, damaged wiring or connectors in the isolation sensing circuit, high voltage leaks, or a malfunctioning hybrid battery.
4. Can I drive my Saturn with the P1B0C code?
It’s not recommended to drive with this code active, as it may indicate a high-voltage safety issue in the hybrid system that could lead to further damage or safety concerns.
5. How do you diagnose the P1B0C code?
Diagnosis involves using a scan tool to confirm the code, inspecting wiring and connectors in the isolation sensing circuit, testing the hybrid battery for voltage leaks, and checking the functionality of the Drive Motor Control Module.
6. What repairs are commonly needed to fix the P1B0C code?
Repairs may include replacing damaged wiring, repairing or replacing the Drive Motor Control Module, addressing hybrid battery issues, or reprogramming the control module if required.
7. How much does it cost to fix the P1B0C code on a Saturn?
Repair costs vary based on the issue but can range from $100 for minor wiring repairs to over $1,000 for hybrid battery or control module replacement.
8. Can a weak hybrid battery cause the P1B0C code?
Yes, a weak or malfunctioning hybrid battery can cause this code if it leads to abnormal voltage readings in the isolation sensing circuit.
9. Can clearing the code fix the P1B0C issue?
Clearing the code may temporarily turn off the warning, but the underlying issue must be resolved to prevent the code from reappearing.
10. Is the P1B0C code unique to Saturn hybrid vehicles?
While the code is specific to Saturn hybrid models, similar codes can appear on other GM vehicles with hybrid systems.
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