What Does P1693 Mean?
Duplicate or secondary detection of metering oil pump stepping motor circuit malfunction in rotary engines. This code often appears alongside P1692, indicating a persistent or severe circuit problem. The PCM has detected ongoing issues with controlling the oil metering pump motor.
Safety Warning
Critical issue for rotary engines as loss of metering oil injection leads to immediate apex seal damage and engine seizure. Do not operate vehicle until repaired.
Common Causes
40%
Complete failure of metering oil pump stepping motor
25%
Short circuit in stepping motor wiring harness
20%
PCM internal driver circuit malfunction
15%
Multiple broken wires in motor circuit
Diagnostic Steps
1
Step 1: Perform continuity test on all wires between PCM and metering oil pump motor
2
Step 2: Check for short circuits to ground or power in motor circuit wiring
3
Step 3: Measure stepping motor coil resistance and compare to specifications
4
Step 4: Inspect PCM connector pins for corrosion, bent pins, or push-back
5
Step 5: Monitor motor control signals with oscilloscope if available to verify PCM output
Estimated Repair Cost
$250 - $900
Parts + labor, varies by vehicle and location
Duplicate or secondary detection of metering oil pump stepping motor circuit malfunction in rotary engines. This code often appears alongside P1692, indicating a persistent or severe circuit problem. The PCM has detected ongoing issues with controlling the oil metering pump motor.
The most common cause of P1693 (Metering Oil Pump Stepping Motor Circuit Malfunction) is: Complete failure of metering oil pump stepping motor
Typical repair costs for P1693 range from $250 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Critical issue for rotary engines as loss of metering oil injection leads to immediate apex seal damage and engine seizure. Do not operate vehicle until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1693 to identify the root cause.
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Quick Info
Category
Powertrain
System
Engine Lubrication (Rotary)
Difficulty
Type
Manufacturer
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