Fault code P0226 – a step-by-step guide to diagnosing and fixing it

Error code P0226 is displayed and the check engine light is on - what does this mean?

The DTC P0226 is triggered by the OBD system when a problem is detected with the throttle position sensor C in the circuit area. This fault code indicates a malfunction in the throttle valve system, which is responsible for regulating the air supply to the engine. For various manufacturers, this code may also be referred to as "Throttle Position Sensor C Circuit Range/Performance".

What causes can this error code have?

• Defective throttle position sensor C
• Damaged wiring to the throttle position sensor
• Corroded or loose plug connections
• Faulty throttle valve or electronic throttle valve control unit
• Defective engine control unit (ECU)
• Dirty throttle valve
• Voltage problems in the sensor supply
• Short circuit or interruption in the sensor cable

What symptoms occur in parallel with fault code P0226?

• Irregular idling: The engine runs unevenly or stutters when idling
• Poor throttle response: Delayed or jerky response when accelerating
• Increased fuel consumption: Noticeably higher consumption than usual
• Engine misfires: Uneven engine running at different engine speeds
• Emergency running program: The vehicle goes into emergency running mode with reduced power
• Starting problems: Difficulty starting the engine
• Stalling: Engine stalls while driving or idling

How can I fix the problem with error code P0226?

• Repairing trouble code P0226 requires a systematic approach to identify the exact cause.
• Clean the throttle valve: Remove the throttle body and clean it thoroughly with special throttle body cleaner to remove deposits and debris
• Sensor replacement: Replace the defective throttle valve sensor C with a new original part or high-quality spare part
• Repair wiring: Check all cables to the throttle position sensor for damage and repair or replace defective cables
• Revise plug connections: Clean all plug connections with contact spray and establish secure contact
• Replace the throttle valve control unit: For electronic throttle valves, replace the complete control unit if the sensor is not available separately
• Check the power supply: Measure the supply voltage of the sensor and repair any problems in the power supply
• Program engine control unit: After replacing components, reprogram the ECU or have it adapted