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 thinks the temperature sensor for the electric motor is saying it's much colder than it really is, which might mean the sensor is broken or there's a problem with the wiring.
The code P1B68 indicates that the temperature reading from the Drive Motor Inverter Temperature Sensor 'C' is lower than expected, suggesting a possible sensor or circuit issue.
The P1B68 code is set when the Powertrain Control Module (PCM) or Battery Energy Control Module (BECM) detects an implausibly low temperature reading from the Drive Motor Inverter Temperature Sensor 'C'. This could be due to a malfunctioning sensor, a wiring issue, or a problem with the sensor circuit.
• Check Engine Light is on
• Reduced vehicle performance
• Inconsistent temperature readings
• Faulty temperature sensor
• Damaged wiring or connectors
• Faulty PCM or BECM
PCM: Powertrain Control Module
BECM: Battery Energy Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the temperature sensor for proper operation.
• Replace the faulty temperature sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM or BECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Volt
• Nissan Leaf
• Toyota Prius
• Regularly inspect wiring and connectors.
• Ensure sensors are clean and free from debris.
• Schedule regular maintenance checks.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional.
• Avoid extreme driving conditions until the issue is resolved.
Check if your vehicle's powertrain or emissions warranty covers sensor-related repairs.
This code is relatively common in hybrid and electric vehicles with complex temperature management systems.
Moderate – It is important to address this issue to prevent potential damage to the electric motor system.
Driving with a faulty temperature sensor can lead to reduced performance and potential safety risks.
• Vehicle at operating temperature
• Stable driving conditions
The Drive Motor Inverter Temperature Sensor 'C' is typically located near the inverter assembly of the electric drive motor.
Q: Can I drive with a P1B68 code?
A: It's not recommended to drive for extended periods with this code, as it may affect vehicle performance and safety.
Q: How do I reset the P1B68 code?
A: After repairs, you can reset the code using an OBD-II scanner, but ensure the issue is fixed first.
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