EXHIBIT 23.03 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statement on Form S-4 (No. 333-55932) of Phillips Petroleum Company of our report dated March 22, 2000 relating to the financial statements of ARCO Alaska Combined Operations, which appears in the Current Report on Form 8-K of Phillips Petroleum Company dated April 18, 2000. /s/ PricewaterhouseCoopers LLP PricewaterhouseCoopers LLP Los Angeles, California March 5, 2001