Canada - Engine Control - MIL ON DTC's P0031 P0051 P2238 P2241

Bulletin
0612

Issue Date
2003-08-06

Market
Canada

Reference
EM-03-002

Model
ES300

Year Range
2003

Component
EM

Subject:
M.I.L. "ON" DTC P0031, P0051, P2238 OR P2241

Under certain driving conditions, some 2003 model year ES 300 vehicles may exhibit a M.I.L. "ON" with at least one of the following DTCs as a result of an Sensor manufacturing issue.
- P0031 (Oxygen Sensor Heater Control Circuit Low [Bank 1, Sensor 1])
- P0051 (Oxygen Sensor Heater Control Circuit Low [Bank 2, Sensor 1])
- P2238 (Oxygen Sensor Pumping Current Circuit Low (for A/F Sensor) [Bank 1, Sensor 1])
- P2241 (Oxygen Sensor Pumping Current Circuit Low (for A/F Sensor) [Bank 2, Sensor 1])

Replacement of the affected Air Fuel Sensor will correct this condition.

APPLICABLE VEHICLES:
2003 model year ES 300 vehicles produced BEFORE the Production Change Effective VINs shown below.







PRODUCTION CHANGE INFORMATION:







PARTS INFORMATION:

REPAIR PROCEDURE:

P0031 or P0051
1. Refer to ETAS, 2003 ES 300 Repair Manual, Diagnostics, SFI System (1MZ-FE 2003 model year) P0031, P0032, P0051, P0052.
2. If there is an open circuit or excessive resistance in A/F Sensor heater, and DTC P0031 or P0051 is stored, replace the A/F sensor.
3. Only replace the A/F Sensor indicated by the M.I.L. "ON" DTC(s).

P2238 or P2241
1. Refer to ETAS, 2003 ES 300 Repair Manual, Diagnostics, SFI System (1MZ-FE 2003 model year) P2237, P2238, P2239, P2240, P2241, P2242.
2. If there is an open circuit in A/F Sensor heater and DTC P2239 or P2241 is stored, replace the A/F sensor.
3. Only replace the A/F Sensor indicated by the M.I.L. "ON" DTC(s).







REPAIR TIME:

NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.