Engine Controls - MIL ON/DTC's P0031/P0138/P2195
T-SB-0066-10Rev1
February 5, 2010
MIL "ON" DTC P2195, P0138, and/or P0031
Service Category
Engine/Hybrid System
Section
Engine Control
Market
USA
Applicability
TSB REVISION NOTICE
April 22, 2010 Rev1:
^ Production Change Information has been updated with VIN information for Japan-built Corolla vehicles.
Any previous printed versions of this service bulletin should be discarded.
Introduction
Some 2010 model year Corolla and Matrix vehicles may exhibit a MIL "ON" condition with one or more of the following Diagnostic Trouble Codes (DTCs):
^ P2195 - Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1)
^ P0138 - Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)
^ P0031 - Oxygen (A/F) Sensor Heater Control Low (Bank 1 Sensor 1)
The Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition occurring. Use the following repair procedure to address this condition.
Production Change Information
This TSB applies to vehicles produced BEFORE the Production Change Effective VINs shown.
Warranty Information
APPLICABLE WARRANTY
^ This repair is covered under the Toyota Federal Emission Warranty. This warranty is in effect for 96 months or 80,000 miles, whichever occurs first, from the vehicle's in-service date.
^ Warranty application is limited to occurrence of the specified condition described in this bulletin.
Parts Information
Calibration Information
Required Tools & Equipment
Repair Procedure
1. Using TIS Techstream check for stored DTCs.
^ If BOTH DTC P2195 and P0138 are set proceed to step 2.
^ If ONLY DTC P2195 is present diagnose per the Repair Manual for P2195 (see below).
^ If ONLY DTC P0138 is present diagnose per the Repair Manual for P0138 (see below).
^ If ONLY DTC P0031 is present diagnose per the Repair Manual for P0031 (see below).
P2195 Diagnosis:
Does the Air Fuel Ratio Sensor have an open or short on the A1A+ or A1A-wires? Refer to the Technical Information System (TIS) 2010 model year Corolla or Matrix Repair Manual:
^ 2010 Corolla / Matrix:
Engine/Hybrid System - Engine Control - "2ZR-FE Engine Control: SF1 System: P2195, P2196: Oxygen (A/F) Sensor Signal Stuck Lean (Bank / Sensor 1)"
^ YES - Repair the harness and reevaluate the Air Fuel Ratio Sensor operation. Confirm the previous DTC(s) do NOT reset.
^ NO - Proceed to step 2.
P0138 Diagnosis:
Inspect the Freeze Frame Data (FFD) values.
^ If the AFS B1S1 voltage = 3.35 3.70V AND the 02S B152 = 0.70 0.90V the A/F sensor is suspect. Proceed to step 2.
^ If the 02S B152 voltage is more than 1.10V and/or the 02S Impedance is more than 300 ohms at operating temperature the A/F sensor is NOT at fault and this TSB does NOT apply.
Refer to the Repair Manual for 02 sensor and 02 sensor circuit diagnosis.
^ 2010 Corolla / Matrix:
Engine/Hybrid System - Engine Control - '2ZR-FE Engine Control: SF1
System: P0136-P0139: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2)"
P0031 Diagnosis:
Determine if the A/F sensor is at fault per the Repair Manual.
^ 2010 Corolla / Matrix:
Engine/Hybrid System - Engine Control - "2ZR-FE Engine Control: SF1 System: P0031, P0032: Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1)"
^ YES - Proceed to step 2.
^ NO - This TSB does NOT apply. Refer to the Repair Manual for further diagnosis.
2. Replace the A/F sensor and proceed to step 3.
3. Check for the Authorized Modifications Label affixed to the vehicle in the location shown in Figure 1. Confirm if the ECM (PCM) calibration has been updated. If the calibration ID listed is NOT the latest ECM (PCM) calibration - go to step 4.
4. Flash re-program the ECM (PCM).
NOTE
^ The GR8 Battery Diagnostic Station MUST be used in Power Supply Mode to maintain battery voltage at 13.5 volts while flash reprogramming the vehicle.
^ For details on how to use the GR8 Battery Diagnostic Station, refer to the located on TIS, Diagnostics - Tools & Equipment - Battery Diagnostics.
Follow the procedures outlined in TSB No. T-SB-0064-10, "Techstream ECU Flash Reprogramming Procedure", and flash the ECM (PCM) with the NEW calibration file update.
5. Install the Authorized Modifications Label.
A. Using a permanent marker enter the following information on the label:
^ ECM part number [Refer to the Parts Information section for the CURRENT PART NUMBER]
^ Calibration ID(s) [Refer to the Calibration Identification Chart for the NEW CALIBRATION ID]
^ Dealer Code
^ Repair Date
^ Change Authority [This TSB number]
B. Affix the Authorized Modifications Label to the vehicle at the location shown in Figure 1. The Authorized Modifications Label is available through the MDC P/N 00451-000001-LBL.
6. Test drive the vehicle to confirm proper vehicle operation.