P1660 on 1994-1999 Acura Integra (LS, GS, RS, Special Edition) — Output Circuit Check Signal High
1 vehicles · 1 makes · $150-$3,500 repair
Most Reported On
P1660 is an OBD-II diagnostic trouble code meaning “Output Circuit Check Signal High.” This is a manufacturer-specific code (seen on Ford and some GM applications) indicating the computer detected an abnormally high voltage on an output circuit monitoring line, suggesting a controlled output (such as a solenoid or relay driver) is not switching as expected. It generally reflects an electrical/circuit problem between the PCM and the device it controls rather than a mechanical failure. Symptoms vary widely depending on which output is affected. Because exact behavior is manufacturer-specific, confirming the definition for the specific vehicle is recommended. This code is most commonly reported on 1994-1999 Acura Integra (LS, GS, RS, Special Edition), with repair costs ranging from $150 to $3,500.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P1660, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P1660 mean?
P1660 stands for "Output Circuit Check Signal High." This is a manufacturer-specific code (seen on Ford and some GM applications) indicating the computer detected an abnormally high voltage on an output circuit monitoring line, suggesting a controlled output (such as a solenoid or relay driver) is not switching as expected. It generally reflects an electrical/circuit problem between the PCM and the device it controls rather than a mechanical failure. Symptoms vary widely depending on which output is affected. Because exact behavior is manufacturer-specific, confirming the definition for the specific vehicle is recommended.
What are the most common causes of P1660?
The most common causes of P1660 are: Wiring short to voltage in an output circuit, Faulty output driver or relay, Corroded or loose connector on the affected circuit, Open ground in the output circuit, Faulty controlled component (solenoid/relay), PCM internal driver fault (less common). The specific cause varies by vehicle.
How much does it cost to fix P1660?
Repair costs for P1660 range from $150 to $3,500, depending on the vehicle and root cause.
Which vehicles are affected by P1660?
Au7o has documented P1660 across 1 vehicle models from 1 manufacturers: Acura.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.