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Most Common Powertrain Systems (P-Codes)

Top trouble codes in this system, by visitor frequency.

Diagnostic Guides for Powertrain Systems (P-Codes)

Free step-by-step guides written to professional diagnostic standards.

Fuel Trim Diagnostics (STFT/LTFT)How to Test a MAF SensorHow to Test a MAP SensorFind & Diagnose a Vacuum LeakEngine Compression & Leak-Down TestDiagnose EVAP System FaultsDiagnose Engine Misfires with a Scan Tool

P2819 – Transmission Range Sensor “D” Circuit Intermittent

4 views 2026-02-27

P2820 – Pressure Control Solenoid “H” Control Circuit/Open

9 views 2026-02-27

P2820 Toyota Corolla – Pressure Control Solenoid “J” Performance or Stuck Off

0 views 2026-05-30

P2821 – Pressure Control Solenoid “H” Control Circuit Low

13 views 2026-02-23

P2822 – Pressure Control Solenoid “H” Control Circuit High

8 views 2026-02-23

P2822 Toyota Corolla – Pressure Control Solenoid “J” Electrical (Shift Solenoid Valve SLP)

0 views 2026-05-30

P2823 – Pressure Control Solenoid “H” Circuit Range/Performance

7 views 2026-02-24

P2824 – Pressure Control Solenoid “H” Stuck On

5 views 2026-02-24

P2825 – Pressure Control Solenoid “H” Stuck Off

6 views 2026-02-24

P2826 – Pressure Control Solenoid “I” Control Circuit/Open

7 views 2026-02-24

P2827 – Pressure Control Solenoid “I” Control Circuit Low

11 views 2026-02-24

P2828 – Pressure Control Solenoid “I” Control Circuit High

7 views 2026-02-24

P2829 – Pressure Control Solenoid “I” Circuit Range/Performance

11 views 2026-02-24

P2829 Toyota Corolla – Pressure Control Solenoid “K” Performance (Shift Solenoid Valve SLS)

0 views 2026-05-30

P282B Toyota Corolla – Pressure Control Solenoid “K” Electrical (Shift Solenoid Valve SLS)

0 views 2026-05-30

P2830 – Pressure Control Solenoid “I” Stuck On

9 views 2026-02-24

P2831 – Pressure Control Solenoid “I” Stuck Off

10 views 2026-02-24

P2832 – Shift Fork “A” Position Circuit

18 views 2026-02-24

P2833 – Shift Fork “A” Position Circuit Low

10 views 2026-02-24

P2834 – Shift Fork “A” Position Circuit High

5 views 2026-02-24

P2835 – Shift Fork “A” Position Circuit Range/Performance

12 views 2026-02-24

P2836 – Shift Fork “B” Position Circuit

10 views 2026-02-24

P2837 – Shift Fork “B” Position Circuit Low

12 views 2026-02-24

P2838 – Shift Fork “B” Position Circuit High

8 views 2026-02-24

P2839 – Shift Fork “B” Position Circuit Range/Performance

3 views 2026-02-24

P2840 – Shift Fork “C” Position Circuit

7 views 2026-02-24

P2841 – Shift Fork “C” Position Circuit Low

5 views 2026-02-24

P2842 – Shift Fork “C” Position Circuit High

6 views 2026-02-24

P2843 – Shift Fork “C” Position Circuit Range/Performance

7 views 2026-02-24

P2844 – Shift Fork “D” Position Circuit

7 views 2026-02-24

P2845 – Shift Fork “D” Position Circuit Low

6 views 2026-02-24

P2846 – Shift Fork “D” Position Circuit High

6 views 2026-02-24

P2847 – Shift Fork “D” Position Circuit Range/Performance

7 views 2026-02-25

P2848 – Shift Fork “E” Position Circuit

5 views 2026-02-25

P2849 – Shift Fork “E” Position Circuit Low

10 views 2026-02-25

P2850 – Shift Fork “E” Position Circuit High

8 views 2026-02-25

P2851 – Shift Fork “E” Position Circuit Range/Performance

9 views 2026-02-25

P2852 – Shift Fork “F” Position Circuit

7 views 2026-02-25

P2853 – Shift Fork “F” Position Circuit Low

9 views 2026-02-25

P2854 – Shift Fork “F” Position Circuit High

9 views 2026-02-25