DTC P1688: Metering Oil Pump Control Circuit Initial Check Problem

WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: DTC P1688 Detection Condition & Possible Causes Chart (1 Of 2)

Courtesy of MAZDA MOTORS CORP.

Fig 2: DTC P1688 Detection Condition & Possible Causes Chart (2 Of 2)

Courtesy of MAZDA MOTORS CORP.

Diagnostic Procedure

Fig 3: DTC P1688 Diagnostic Procedure Chart (Step 1-3)

Courtesy of MAZDA MOTORS CORP.

Fig 4: DTC P1688 Diagnostic Procedure Chart (Step 4-9)

Courtesy of MAZDA MOTORS CORP.

Fig 5: DTC P1688 Diagnostic Procedure Chart (Step 10-14)

Courtesy of MAZDA MOTORS CORP.