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 is having trouble figuring out if the car is in park. It's like when you can't tell if a toy car is stopped or still moving.
The powertrain control module (PCM) in hybrid or electric vehicles monitors the transmission's park position. This code indicates it cannot detect or validate the park position.
The P1B33 code is triggered when the Hybrid/EV Powertrain Control Module detects an issue with the transmission's ability to confirm the vehicle is in the park position. This could be due to a faulty sensor, wiring issue, or internal PCM fault.
• Vehicle may not start
• Transmission warning light on
• Inability to shift out of park
• Faulty park position sensor
• Wiring or connection issues
• Internal PCM fault
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Check for any other related codes
• Inspect park position sensor and wiring
• Test the PCM for faults
• Replace faulty park position sensor
• Repair or replace damaged wiring
• Reprogram or replace the PCM if necessary
• OBD-II scanner
• Multimeter
• Diagnostic software
$200 - $800
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance checks
• Ensure wiring is secure and undamaged
• Update vehicle software regularly
Transmission Monitoring Issue
• Do not force the gear shifter
• Have the vehicle inspected by a professional
• Avoid driving until issue is resolved
Check if the vehicle's powertrain warranty covers transmission components.
This code has been reported in hybrid and electric vehicles, particularly as they age and components wear.
High – This issue can prevent the vehicle from starting or shifting properly, affecting drivability.
Driving with this issue may lead to unsafe conditions. It is advisable to address it promptly.
• Vehicle in park
• Engine off
The park position sensor is typically located on the transmission or gear shifter assembly.
Q: Can I drive my car with a P1B33 code?
A: It's not recommended as it may not shift properly or could lead to further damage.
Q: How do I reset the P1B33 code?
A: The code can be reset with an OBD-II scanner, but it's important to fix the underlying issue first.
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