DTC P1149/17557: Oxygen Sensor Control Bank 1 UNPLAUSIBLE Control Value Or DTC P1150/17558: Oxygen Sensor Control Bank 2 UNPLAUSIBLE Control

If scan tool displays DTC P1149/17557 or P1150/17558 perform following tests:

• Check oxygen sensor control and adaptation values. For testing procedure, go to DTC P1111/17519 OR P1112/17520  or DTC P1147/17555 OR DTC P1148/17556  .
• Check fuel pressure. See FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
• Check air intake system for leaks (false air).

If problem is found, repair as necessary. After repairs, use scan tool to clear DTCs and generate a ECM readiness code. See FUNCTION 05 - CLEARING DIAGNOSTIC TROUBLE CODES  and READINESS CODE  under SELF-DIAGNOSTIC SYSTEM. Test drive vehicle. Using scan tool, retrieve DTCs. If DTC does not reset testing is complete.