Electrical - MIL ON/DTC P0101/P0172/P035#/P2237/P2238
S-SB-0050-08November 12, 2008
M.I.L. "ON" DTC P0101, P0172, P035 #, P2237 or P2238
Service Category
Engine/Hybrid System
Section
Engine Control
Market
USA
Applicability
Introduction
Some 2008 - 2009 model year xB vehicles may exhibit a M.I.L. "ON" with one of the following Diagnostic Trouble Codes (DTCs):
^ P0101 - Mass Air Flow Circuit Range / Performance Issue
^ P0172 - System Too Rich
^ P035 # - Ignition Coil '# ' Primary / Secondary Circuit
^ P2237 - Oxygen (A/F) Sensor Pumping Current Circuit / Open
^ P2238 - Oxygen (A/F) Sensor Pumping Current Circuit Low
An improved engine wire harness has been developed and implemented in production to address this condition. Use the following repair procedure to diagnose and repair customer complaint vehicles.
Production Change Information
This TSB applies to vehicles produced BEFORE the Production Change Effective VINs shown.
Parts Information
Warranty Information
APPLICABLE WARRANTY
^ This repair is covered under the Toyota Comprehensive Warranty. This warranty is in effect for 36 months or 36,000 miles, whichever occurs first, from the vehicle's in-service date.
^ Warranty application is limited to correction of a problem based upon a customer's specific complaint.
Required Tools & Equipment
Additional TIS Techstream units may be ordered by calling Approved Dealer Equipment (ADE).
Repair Procedure
1. Using TIS Techstream check for stored DTCs.
2. Verify one of the following DTCs is present.
^ P0101
^ P0172
^ P035 #
^ P2237
^ P2238
NOTE
If other DTCs are present along with any of the DTCs listed above, this TSB does NOT apply. Follow Repair Manual procedures to diagnose those DTCs.
3. Follow Repair Manual procedure to inspect the DTC-related component(s).
Refer to the Technical Information System (TIS) applicable model year Scion xB Repair Manual:
4. If the DTC-related component(s) is within Repair Manual specifications replace the engine wire harness.
5. After replacing the engine harness clear DTCs and verify that no DTCs reset. Then warm vehicle to operating temperature and test drive to verify repair.