P1693 — Metering Oil Pump Stepping Motor Circuit Malfunction

For Ford vehicles

turbo charge solenoid circuit Mazda

powertrain (engine/transmission)

Is it safe to drive?

Short-term driving is OK In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

How to diagnose with an OBD scanner

Read the code and freeze frame Connect an OBD2 scanner, confirm P1693 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the metering oil pump stepping motor for damage, corrosion, chafing or poor contact.
Subsystem check Run the module's actuator test for the metering oil pump stepping motor if your scanner supports it — a component that does not respond to a direct command is confirmed faulty.
Subsystem check Measure reference voltage, ground and signal continuity at the component connector.
Subsystem check Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P1693 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P1693 (parts and labor, USD, independent shop rates): Control module repair: $300–$1,000; Replace the faulty sensor or actuator: $150–$500; Repair wiring or connectors: $80–$250. Overall, fixing P1693 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

How much does it cost to fix P1693?

Control module repair — $300–$1,000; Replace the faulty sensor or actuator — $150–$500; Repair wiring or connectors — $80–$250. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

Will P1693 clear itself?

Sometimes P1693 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What are the symptoms of P1693?

Drivers most often notice: possible limp mode depending on the affected component, Check Engine Light on, increased fuel consumption in some cases, the affected system operates intermittently or not at all.

What is the most common cause of P1693?

The most common causes are: blown fuse feeding the circuit, open or shorted wiring in the circuit, corroded, loose or damaged connector.

What does OBD2 code P1693 mean?

Metering Oil Pump Stepping Motor Circuit Malfunction (P1693): a powertrain (engine/transmission) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by blown fuse feeding the circuit, open or shorted wiring in the circuit, corroded, loose or damaged connector.

When your vehicle's engine control module detects a problem with the metering oil pump stepping motor circuit, it stores OBD2 trouble code P1693. This code falls within the powertrain category, meaning it relates directly to engine or transmission operation. The "circuit malfunction" designation tells you the module's built-in self-test found something wrong during its diagnostic routine, but unlike simpler electrical faults, this type of code doesn't automatically point to a single bad wire or sensor. The fault could reside within the stepping motor itself, the wiring connecting it to the computer, or even the control module's driver circuitry that sends commands to the component.

The engine control unit doesn't set P1693 after a single questionable reading. Instead, it requires the fault condition to appear consistently under specific operating conditions—typically during a drive cycle when temperature, load, and RPM match certain thresholds. When the module finally decides to illuminate your Check Engine light and store this code, it simultaneously captures a freeze frame snapshot: a detailed record showing engine speed, load percentage, coolant temperature, and vehicle speed at the exact moment the fault was detected. This data proves invaluable during diagnosis because it lets you recreate the conditions that triggered the code rather than chasing phantom problems that occur under unrelated circumstances.

Understanding why the metering oil pump stepping motor matters helps clarify why this code matters to you. The stepping motor controls precise oil flow to the metering system, which affects how fuel gets delivered and atomized in some engine designs. When this motor fails or its control circuit malfunctions, the engine computer may detect the irregularity through its self-check and store P1693 rather than allowing the engine to run with potentially incorrect fuel metering. Depending on which specific circuit or component fails, you might notice nothing more than a steady warning light, or you could experience noticeable driveability issues that affect how your vehicle performs.

Common Symptoms of P1693

The Check Engine light illuminates on your dashboard, often remaining steady rather than flashing
Depending on which specific component triggered the fault, the engine may enter limp mode with reduced power and torque
Some vehicles exhibit noticeably higher fuel consumption as the metering system operates outside its intended parameters
The affected system—whether it's the oil metering pump or related components—may function intermittently or stop working entirely until the fault clears

What Causes P1693?

Because this code represents a general circuit malfunction rather than a specific electrical failure, multiple potential culprits exist. The most frequent causes tend to be:

An internal failure within the metering oil pump stepping motor itself, where the motor windings or mechanical components wear out or seize
Wiring problems throughout the circuit, including broken conductors hidden inside insulation, exposed wires rubbing against metal, or connectors that have corroded, loosened, or sustained water damage
Faulty sensors or actuators that the control module monitors as part of its self-test routine
Poor ground connections at the component or control module, causing erratic signal behavior that the computer interprets as a malfunction
Software or programming issues within the engine control module that prevent it from properly commanding or reading the stepping motor circuit
Opens or shorts in the wiring harness that interrupt communication between the computer and the motor
Damaged connectors with bent pins, pushed-in seals, or spread terminals that create intermittent contact

How to Diagnose P1693

Effective diagnosis requires systematic testing rather than random part replacement. Follow these steps in order:

Connect a quality OBD2 scanner to your vehicle's diagnostic port, retrieve code P1693, and record all freeze frame data associated with it—this tells you exactly what engine conditions existed when the module first detected the fault
Check for any related trouble codes stored in the system, as these often point toward the root cause rather than the symptom; also research your specific make and model for any technical service bulletins that address P1693, since manufacturers sometimes publish known fixes or software updates
Perform a thorough visual inspection of all wiring and connectors associated with the metering oil pump stepping motor, looking for damaged insulation, corroded pins, disconnected plugs, or wires that have chafed through and shorted against metal surfaces
If your scanner supports bidirectional controls, run the actuator test for the metering oil pump stepping motor—a component that fails to respond when directly commanded is confirmed faulty and eliminates guesswork
With the key on and engine off, measure reference voltage, ground integrity, and signal continuity at the motor's electrical connector using a digital multimeter, comparing your readings against manufacturer specifications
Perform a wiggle test on the harness while monitoring live data on your scanner, watching for signal dropouts or fault reappearance that indicate broken wires inside the insulation
After clearing the code, complete a full drive cycle that recreates the exact conditions shown in your freeze frame data, then verify the Check Engine light stays off and P1693 does not return

How to Fix P1693

Repair strategies range from simple connector repairs to full control module replacement, depending on what testing reveals:

Wiring and connector repair: $80–$250 — cleaning corrosion, soldering broken wires, or replacing damaged connectors often resolves intermittent faults without requiring new components
Sensor or actuator replacement: $150–$500 — if testing confirms the metering oil pump stepping motor itself has failed internally, replacement restores proper function; this represents the most common actual part failure
Control module repair or replacement: $300–$1,000 — in rare cases where the engine computer's driver circuit has failed, module repair by a specialist or full replacement becomes necessary

Always pursue the least expensive diagnosis first. Wiring issues, poor grounds, and corroded connectors account for the majority of intermittent electrical faults and cost almost nothing to address compared to control module replacement.

How Much Does It Cost to Fix P1693?

Total repair costs for P1693 vary considerably depending on which component actually failed. At independent repair shops using aftermarket or rebuilt parts, expect to pay between $80 and $1,000 depending on whether you're fixing wiring, replacing the stepping motor, or addressing control module issues. The wide range reflects genuine differences in what can go wrong rather than repair shop inconsistency. A proper electrical diagnosis before purchasing parts saves money in every scenario—the most expensive fix is almost never the first thing to check.

Can You Drive with P1693?

Short verdict: Generally yes, but monitor for worsening symptoms. Most vehicles remain drivable when this code is active, though you may notice reduced performance, slightly altered throttle response, or a disabled auxiliary system depending on your engine's design. If the vehicle exhibits stalling, failure to start, or any warnings related to braking or steering assist, treat the situation as urgent and have it towed rather than driving. Otherwise, schedule diagnostic testing within a week or two rather than ignoring the problem indefinitely.