What Does P07B6 Mean?
The transmission park position sensor/switch "A" circuit performance is high, meaning the sensor signal is within valid range but reading higher than expected for the actual gear position. The TCM has detected a rationality error where the sensor output is shifted toward the high end of its range, not matching the expected voltage for the current transmission position. This suggests sensor degradation, mechanical misalignment, or a wiring issue affecting signal accuracy.
Common Causes
30%
Park position sensor A misalignment or improper installation causing offset readings
30%
Degraded sensor element producing inaccurate high-range voltage output
20%
Partial open or high-resistance ground return path elevating signal voltage
15%
Shift cable maladjustment or manual valve not fully seating in detent positions
5%
Slight short to voltage source on sensor signal wire elevating reading
Diagnostic Steps
1
Monitor park position sensor A voltage in real-time through all gear positions and compare readings to manufacturer voltage specification chart.
2
Verify sensor A alignment and mounting on the transmission — check that the sensor is properly indexed to the manual valve shaft or rotor.
3
Inspect and adjust the shift cable to ensure the manual valve fully seats in each detent position.
4
Check sensor A ground circuit for high resistance by measuring voltage drop across the ground path with the sensor energized.
5
If mechanical alignment and wiring are confirmed correct, replace the park position sensor A due to internal element drift.
Estimated Repair Cost
$150 - $500
Parts + labor, varies by vehicle and location
The transmission park position sensor/switch "A" circuit performance is high, meaning the sensor signal is within valid range but reading higher than expected for the actual gear position. The TCM has detected a rationality error where the sensor output is shifted toward the high end of its range, n...
The most common cause of P07B6 (Transmission Park Position Sensor/Switch "A" Circuit Performance High) is: Park position sensor A misalignment or improper installation causing offset readings
Typical repair costs for P07B6 range from $150 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle is likely still drivable but may display incorrect gear positions or have intermittent shift interlock issues. Park detection may be unreliable. Always use the parking brake as a backup. Repair within a reasonable timeframe.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P07B6 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission Control / Park System
Difficulty
Type
Generic (SAE)
Recommended Tools
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