Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Inspection Procedure
HINT:
- The detection of DTC P0505 may also be caused by: 1) the floor carpet overlapping onto the accelerator pedal, causing the accelerator pedal to be slightly depressed (throttle position to be slightly open); or 2) the accelerator pedal not being fully released.
- Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
- CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0505)
- Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
- Turn the ignition switch ON.
- Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
- Read the DTCs.
HINT:
If any other codes besides P0101 are output, perform troubleshooting for those DTCs first.
Result
RESULT REFERENCEDisplay (DTC output) Proceed to P0505 A P0505 and other DTCs B HINT:
If any DTCs other than P0505 are output, troubleshoot those DTCs first.
B: GO TO RELEVANT DTC CHART
A: Go to next step
- CHECK CONNECTION OF VENTILATION HOSE
OK:
Ventilation hose is connected correctly and is not damaged.
NG: REPAIR OR REPLACE VENTILATION HOSE
OK: Go to next step
- CHECK AIR INDUCTION SYSTEM
- Check for vacuum leaks in the air induction system.
OK:
No leakage from air induction system.
NG: REPAIR OR REPLACE AIR INDUCTION SYSTEM
OK: Go to next step
- Check for vacuum leaks in the air induction system.
- CHECK THROTTLE VALVE
- Check the throttle valve condition.
NG: REPLACE THROTTLE BODY
OK: REPLACE ECM
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.
