P1690 – OBD-II DTC

OBD-II DTC P1690 – Metering Oil Pump Stepping Motor Circuit Malfunction

DTC P1690 meaning

DTC P1690 refers to a malfunction in the metering oil pump stepping motor circuit. This code indicates that the Engine Control Module (ECM) has detected an issue with the electrical circuit that controls the stepping motor responsible for regulating the oil pump’s operation. The metering oil pump is crucial for maintaining proper oil pressure and flow within the engine, which is essential for lubrication and overall engine performance.

DTC P1690 symptoms

Common symptoms associated with DTC P1690 may include:

• Illuminated check engine light
• Decreased engine performance
• Increased engine noise due to insufficient lubrication
• Oil pressure warning light activation
• Potential engine overheating

DTC P1690 causes

Several factors can lead to the triggering of DTC P1690, including:

• Faulty metering oil pump stepping motor
• Wiring issues such as shorts, opens, or corrosion in the circuit
• Defective Engine Control Module (ECM)
• Poor electrical connections or damaged connectors
• Low oil levels or contaminated oil

DTC P1690 seriousness

DTC P1690 is considered a serious issue as it can lead to inadequate oil circulation within the engine. This can result in:

• Increased wear and tear on engine components
• Potential engine damage or failure
• Reduced engine efficiency and performance

It is advisable to address this code promptly to prevent further complications.

How to diagnose DTC P1690

To diagnose DTC P1690, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1690 code.
2. Inspect the vehicle’s oil level and condition.
3. Check the wiring and connectors related to the metering oil pump stepping motor for damage or corrosion.
4. Test the metering oil pump stepping motor for proper operation using a multimeter.
5. Examine the Engine Control Module (ECM) for any faults or updates.

How to fix DTC P1690 step-by-step instructions

To fix DTC P1690, follow these step-by-step instructions:

1. Ensure the engine is off and the key is removed from the ignition.
2. Check and top off the engine oil if necessary.
3. Inspect the wiring and connectors for the metering oil pump stepping motor, repairing or replacing any damaged components.
4. Test the metering oil pump stepping motor with a multimeter to ensure it operates within specifications replace it if faulty.
5. Clear the DTC using an OBD-II scanner and take the vehicle for a test drive to see if the code returns.

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