P0226
Stop drivingThrottle/Pedal Position Sensor/Switch 'C' Circuit Intermittent/Erratic
Code P0226 means your engine computer detects an intermittent or erratic signal from the throttle or pedal position sensor 'C'. Common causes: Faulty sensor (60%), wiring issues (25%), throttle body (10%). Drivability: No, stop driving. Repair cost: $100-$300 DIY, $200-$700 professional.
Can I Drive With P0226?
No, stop driving
Immediate repair needed
Stop driving immediately if: Flashing CEL, loud noises, burning smell, rotten egg smell, significant power loss
Symptoms of P0226
- 1Engine enters 'limp mode' (reduced power)
- 2Erratic or no throttle response
- 3Engine stalls unexpectedly
- 4Rough or fluctuating idle
- 5Vehicle accelerates or decelerates without driver input
- 6Check Engine Light is on or flashing
Common Causes of P0226
Parts most likely causing this code, ranked by probability
The sensor itself is sending inconsistent or incorrect voltage signals to the engine computer.
60% of P0226 cases are fixed by replacing this sensor
Damaged, corroded, or loose wiring or connectors to the APPS or TPS can disrupt the signal.
25% of P0226 cases are fixed by repairing wiring or connectors
If the Throttle Position Sensor is integrated into the throttle body, a fault in the throttle body motor or gears can cause erratic sensor readings.
10% of P0226 cases are fixed by replacing the throttle body
A rare but possible cause where the engine computer itself is unable to correctly process the sensor's input.
5% of P0226 cases are fixed by replacing the ECM/PCM
Check These First (Before Buying Parts)
- Inspect the wiring harness and electrical connectors for the Accelerator Pedal Position Sensor (APPS) and Throttle Position Sensor (TPS) for any visible damage, corrosion, or looseness.
- Clear the code with an OBD-II scanner and see if it returns immediately upon starting the engine or pressing the accelerator pedal.
- Use an advanced scan tool to monitor the live data stream from the APPS and TPS. Look for any erratic or inconsistent voltage readings as you slowly press and release the accelerator pedal.
How to Diagnose P0226
- 1Visually inspect the wiring harness and connectors for the APPS (on the pedal) and TPS (on the throttle body) for any signs of damage, corrosion, or looseness.
- 2Use an advanced OBD-II scan tool to monitor live data from the Accelerator Pedal Position Sensor and Throttle Position Sensor 'C' circuit. Look for erratic voltage spikes, drops, or flat spots as the pedal is pressed slowly.
- 3With the ignition off, disconnect the sensor connector and use a multimeter to test the sensor's resistance and voltage output according to your vehicle's service manual specifications.
- 4If the TPS is integrated into the throttle body, test the entire throttle body assembly for proper operation and smooth movement.
- 5If all sensor and wiring checks pass, consider a professional diagnosis for a potential ECM/PCM issue.
P0226 on Popular Vehicles
Honda Accord
2003-2012These models are known for Accelerator Pedal Position Sensor (APPS) failures or issues with the electronic throttle body assembly, which can trigger P0226.
70% fixed by replacing APPS or throttle body
Ford F-150
2004-2014Electronic throttle body failures are a common cause for P0226 on these trucks, often leading to limp mode and reduced power.
65% fixed by replacing the throttle body
Toyota Camry
2007-2017While less common than on other makes, P0226 on a Camry often points to a failing Accelerator Pedal Position Sensor or, in some cases, a wiring harness issue near the throttle body.
60% fixed by replacing APPS or repairing wiring
Frequently Asked Questions
What does P0226 mean?
P0226 indicates that your vehicle's engine computer has detected an intermittent or erratic signal from the 'C' circuit of either the Accelerator Pedal Position Sensor (APPS) or the Throttle Position Sensor (TPS). This sensor tells the computer how much throttle input you are requesting.
Can I drive with P0226?
No, stop driving. This code points to a critical issue with your vehicle's throttle control. Driving with P0226 can lead to sudden loss of power, unintended acceleration, or stalling, creating extremely unsafe driving conditions.
Will P0226 clear itself?
No, P0226 will not clear itself. This code signifies a hard fault that requires diagnosis and repair. The engine computer will keep the Check Engine Light on until the underlying issue is resolved and the system passes its self-test.
How do I fix P0226 myself?
Start by inspecting the wiring and connectors for the throttle body and accelerator pedal for any visible damage or corrosion. If the wiring looks good, use a scan tool to monitor the sensor's live data. If the data is erratic, replace the Accelerator Pedal Position Sensor or the Throttle Position Sensor. If the TPS is integrated, you might need to replace the entire throttle body.
How much does it cost to fix P0226?
The cost to fix P0226 yourself ranges from $100 to $300 for a new sensor or $200 to $500 for a throttle body. Professional repair costs typically range from $200 to $700, including parts and labor, depending on whether it's a sensor or a full throttle body replacement.
P0226 keeps coming back - why?
If P0226 keeps returning, it often means the initial repair did not address the root cause. This can happen if you replaced only the sensor when the wiring was faulty, or if the throttle body itself was the issue. A rare but possible cause for recurrence is a failing engine computer (ECM/PCM).
Will P0226 fail emissions/smog test?
Yes, P0226 will cause your vehicle to fail an emissions or smog test. The Check Engine Light being on is an automatic failure in most jurisdictions, and a critical engine control fault like this prevents the vehicle from completing its readiness monitors.
What's the difference between P0226 and P0220?
P0220 indicates a general fault in the Throttle/Pedal Position Sensor/Switch 'B' circuit, meaning the computer sees an electrical problem. P0226 specifically points to an 'intermittent/erratic' signal from the 'C' circuit, suggesting the signal is inconsistent rather than a constant open or short circuit.
P0226 on Honda Accord?
On Honda Accords, especially models from 2003-2012, P0226 can frequently be traced back to a faulty Accelerator Pedal Position Sensor (APPS) or issues with the electronic throttle body. These components are known wear items on these vehicles.
Questions to Ask Your Mechanic
Did you check the live data from both the Accelerator Pedal Position Sensor and the Throttle Position Sensor 'C' circuit for erratic readings?
Good answer: Yes, I monitored both sensors and saw inconsistent voltage spikes from the APPS when the pedal was pressed slowly. That's why I'm recommending replacing the pedal assembly.
What did you find when inspecting the wiring harness and connectors for corrosion or damage?
Good answer: I thoroughly checked the wiring from the pedal to the ECM and from the throttle body to the ECM. All connections were clean and secure, and there were no signs of chafing or damage.
Repair Cost Estimate
DIY Repair
Parts only
$100-$300
Shop Repair
Parts + labor
$200-$700
Save $100-$400 by doing it yourself
Difficulty
intermediate
Time
1-3 hours
Intermediate. This repair requires an OBD-II scan tool with live data capabilities and a multimeter for proper diagnosis, which goes beyond basic code reading.
Cost of Waiting
Ignoring P0226 can lead to dangerous driving conditions, including sudden loss of power or unintended acceleration. This is a safety hazard that needs immediate attention. A $100 sensor replacement now prevents a potential accident or being stranded.
While You're In There...
If you are replacing the entire throttle body, it is essential to replace the gasket to ensure a proper seal and prevent vacuum leaks.
Accessing the throttle body often involves removing parts of the air intake system, making it a convenient time to replace a dirty air filter.
Cleaning electrical connectors for the APPS and TPS can resolve intermittent issues caused by corrosion without replacing parts.
Tools You'll Need
- OBD-II Scan Tool (with live data capability)
- Multimeter
- Basic Hand Tools (sockets, screwdrivers)
- Electrical Contact Cleaner
P0226 is a serious code that affects your vehicle's safety, but it's often resolved by replacing a sensor or repairing a wiring issue. Once fixed, your vehicle's throttle response and drivability will be restored.
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Your Next Steps
Step 1: Carefully inspect the wiring and connectors for both the accelerator pedal and the throttle body. Look for frayed wires, bent pins, or corrosion. Clean any corroded connections with electrical contact cleaner.
Step 2: If the wiring appears good, use an advanced OBD-II scan tool to monitor the live data from the Accelerator Pedal Position Sensor and Throttle Position Sensor 'C' circuit. Slowly press the accelerator pedal and watch for any sudden jumps, drops, or flat spots in the voltage readings. If the readings are erratic, the sensor is likely faulty.
Step 3: Based on your scan tool findings, replace the faulty Accelerator Pedal Position Sensor or Throttle Position Sensor. If the TPS is integrated into the throttle body and showing issues, you will need to replace the entire throttle body assembly.