What Does P07B5 Mean?
The transmission park position sensor/switch "A" circuit performance is low, meaning the sensor signal is within the valid range but reading lower than expected for the current gear position. The TCM has detected that the sensor output does not properly correlate with the expected Park position value, trending toward the low end. This is a rationality fault rather than a hard circuit failure, suggesting the sensor is partially degraded, mechanically misaligned, or experiencing intermittent contact issues.
Common Causes
30%
Park position sensor A mechanically misaligned or improperly adjusted on the transmission
30%
Worn or contaminated sensor element producing inaccurate low-range readings
20%
High-resistance connection in the sensor circuit causing voltage drop on the signal
15%
Manual valve or park mechanism wear causing improper detent positioning
5%
Partial ground fault on sensor signal wire reducing voltage output
Diagnostic Steps
1
Monitor park position sensor A voltage in real-time while slowly moving the shift lever through all positions — compare actual voltages to factory specification charts.
2
Inspect sensor A mounting and alignment on the transmission — verify it is properly positioned relative to the manual valve shaft.
3
Check shift cable adjustment and manual valve detent positioning to ensure the transmission is fully seating in each gear position.
4
Measure sensor circuit resistance at the connector and look for high-resistance connections that could cause a voltage drop.
5
If alignment and wiring are correct, replace the park position sensor A, as internal element degradation causes gradual performance drift.
Estimated Repair Cost
$150 - $500
Parts + labor, varies by vehicle and location
The transmission park position sensor/switch "A" circuit performance is low, meaning the sensor signal is within the valid range but reading lower than expected for the current gear position. The TCM has detected that the sensor output does not properly correlate with the expected Park position valu...
The most common cause of P07B5 (Transmission Park Position Sensor/Switch "A" Circuit Performance/Low) is: Park position sensor A mechanically misaligned or improperly adjusted on the transmission
Typical repair costs for P07B5 range from $150 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle should still be drivable but gear position detection may be slightly inaccurate. The shift interlock may intermittently malfunction. Park confirmation may be unreliable, so always engage the parking brake. Schedule repair soon.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P07B5 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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