Emissions - MIL ON/DTCs P0418/P0419/P2441-P2447
T-SB-0160-11October 17, 2011
Secondary Air Injection System - Water Intrusion: MIL "ON" DTC P0418, P0419, and/or P244 #
Service Category
Engine/Hybrid System
Section
Engine Control
Market
USA
Applicability
Introduction
Some 2008 - 2011 model year Sequoia and 2007 - 2011 model year Tundra vehicles may exhibit a MIL "ON" condition with Diagnostic Trouble Codes (DTCs) P0418, P0419, P2440, P2441, P2442, P2443, P2445, and/or P2447. This condition may be caused by water intrusion into the air injection pump assemblies. Use the following procedure to address this condition.
Required Tools & Equipment
Warranty Information
Parts Information
Repair Procedure
1. Using TIS Techstream check if DTCs P0418 P0419 P2440 P2441 P2442 P2443 P2445 and/or P2447 are present.
2. Using TIS Techstream perform the manual Air Injection Active Test (options 1 and 2) to verify if the signal from the air injection control driver is reaching the air pumps.
The pumps should be heard turning on at this point and there should be battery voltage on pin 2 of the pumps during this test. If there is NO voltage refer to TSB No. T-SB-0029-08, "Air Injection Control Driver"
3. If during the test voltage is present at the pump and the pump is NOT running or the Air Pressure (gauge) value did NOT increase from 0 to 1 psi on TIS Techstream with the pump running remove the air pump assemblies for inspection.
Refer to the Technical Information System (TIS) applicable model and model year Repair Manual:
4. With the pumps removed from the vehicle verify if there is liquid or evidence that liquid entered the pumps.
^ YES - If there is liquid evidence go to step 5.
^ NO - If there is NO evidence of liquid go to step 7.
5. If liquid evidence is present replace the air pump inlet and two pump assemblies and install clamps on the inlet pipe to air pump hose joint as shown below in Figures 1 and 2.
NOTE
ONLY install clamps on vehicles where they are not currently installed. If already present, reuse the currently installed clamps.
Refer to TIS applicable model and model year Repair Manual:
6. In some instances where water may have entered the system DTCs P2440/P2441/P2442/P2443 may set. Replacement of the emission control valves is necessary to ensure reliability.
Refer to TIS applicable model and model year Repair Manual to replace the emission control valves:
7. If there is NO liquid found in the air pump assemblies or the DTCs are still present after replacement inspect the air injection system.
Refer to TIS applicable model and model year Repair Manual:
8. Clear the DTC(s) and road test the vehicle to confirm the condition has been corrected.