The P2135 code on your 2022 Toyota Camry indicates a range/performance issue with the throttle/pedal position sensor A circuit. This code affects your Camry's 2.5L 4-cylinder or 3.5L V6 engine's electronic throttle control system, signaling a correlation problem between multiple throttle position sensors.
Understanding P2135 on Camry
Modern electronic throttle systems use dual position sensors on both the accelerator pedal and throttle body for redundancy and safety verification. Code P2135 sets when the PCM detects that the voltage readings from these sensors don't correlate properly - they should track together within a specific tolerance as the throttle moves through its range.
Common Symptoms
- Check engine light illuminated
- Reduced engine power mode activated
- Throttle response limited or erratic
- Engine may idle only
- Hesitation during acceleration
- Vehicle may enter limp mode
- Possible stalling
Primary Causes
- Faulty throttle body with dual TPS sensors
- Damaged wiring between throttle body and PCM
- Corroded throttle body connector
- Accelerator pedal position sensor fault
- 5-volt reference circuit problem
- Ground circuit issue
- PCM internal fault (rare)
Diagnostic Procedure for 2022 Camry
Using a scan tool, monitor both throttle position sensor voltages (TPS1 and TPS2) as the throttle is slowly opened. The sensors should track proportionally in opposite directions (one increases while the other decreases). Check for voltage dropout or erratic readings. Inspect the throttle body connector for corrosion. Test 5-volt reference and ground circuits at the throttle body. Compare accelerator pedal sensor readings to throttle body sensors.
Repair Solutions
If the throttle body sensors don't track properly, throttle body replacement is typically required as sensors are integrated. Clean corroded connectors with electrical contact cleaner. Repair damaged wiring in the throttle body circuit. If accelerator pedal sensor is the cause, replace the pedal assembly. After replacement, perform throttle body relearn procedure per Toyota specifications. Clear codes and verify proper sensor correlation during test drive.