P0226: Throttle/Pedal Position Sensor C Circuit Range/Performance
The P0226 code indicates that the Engine Control Module (ECM) has detected a range or performance issue in the 'C' circuit of the throttle position sensor (TPS) or accelerator pedal position sensor (APPS). This sensor is typically part of a dual or triple sensor assembly that monitors throttle plate angle or pedal position. The ECM compares signals from multiple sensors; if the 'C' circuit signal is out of expected range or inconsistent with other sensors, it sets this code. Common causes include a faulty sensor, wiring issues, or a misadjusted throttle stop.
01. Most Common Causes
- Faulty throttle position sensor (TPS) or accelerator pedal position sensor (APPS)
- Damaged, corroded, or loose wiring/connectors in the sensor circuit
- Carbon buildup on throttle body affecting sensor readings
- Misadjusted throttle stop or mechanical binding
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Poor acceleration or hesitation
- Erratic idle or stalling
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm code P0226 and check for additional codes.
Step 2: Visually inspect the TPS/APPS connector and wiring for damage or corrosion.
Step 3: Test sensor voltage with a multimeter; compare readings to manufacturer specs.
Step 4: Check throttle body for carbon buildup and clean if necessary.
Step 5: If sensor is faulty, replace it and clear the code.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. The vehicle may enter limp mode, limiting speed and acceleration, which can be dangerous in traffic.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, but costs can vary depending on the vehicle and if the throttle body needs cleaning.