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
- CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P011B)
- Connect a Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the tester ON.
- Select the following menu items: Powertrain/Engine and ECT/Trouble Codes.
- Read DTCs.
Result
RESULT REFERENCEDisplay (DTC Output) Proceed To P011B A P011B and other DTCs B HINT:
If any DTCs other than P011B are output, troubleshoot those DTCs first.
B: GO TO DTC CHART
A: Go to next step
- READ VALUE USING TECHSTREAM (INTAKE AIR TEMPERATURE)
- Leave the vehicle for 7 hours or more.
HINT:
It is necessary leave the vehicle for 7 hours or more to allow conditions similar to the DTC detection conditions.
- Connect a Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the tester ON.
- Select the following menu items: Powertrain/Engine and ECT/All Data/Intake Air.
- Read the value displayed on the tester.
OK: The difference between the intake air temperature and the actual outside air temperature is within 10°C (18°F).
HINT:
Temperature readings on the vehicle's outside temperature gauge (if equipped) are not suitable for comparing to the IAT reading. The outside temperature gauge has a significant delay built in to prevent swings in the temperature display. Use an accurate thermometer to determine the outside air temperature.
NG: REPLACE MASS AIR FLOW METER (See REMOVAL )
OK: Go to next step
- Leave the vehicle for 7 hours or more.
- READ VALUE USING TECHSTREAM (COOLANT TEMPERATURE)
- Connect a Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the tester ON.
- Select the following menu items: Powertrain/Engine and ECT/All Data/Coolant Temp.
- Read the value displayed on the tester.
OK: The difference between the coolant temperature and the actual outside air temperature is within 10°C (18°F).
HINT:
If the result is not as specified, check that there are no heat sources such as a block heater in the engine compartment.
NG: REPLACE ENGINE COOLANT TEMPERATURE SENSOR (See REMOVAL )
OK: REPLACE ECM (See REMOVAL )
Use the Manual With the Right Hardware
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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.
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