ECM-940A on 2017-2022 Volvo V90 Cross Country — Engine Control Module Fault (Volvo)
1 vehicles · 1 makes · $200-$800 repair
Most Reported On
ECM-940A is an OBD-II diagnostic trouble code meaning “Engine Control Module Fault (Volvo).” Volvo-specific engine control module diagnostic code. Indicates an ECM-detected performance issue. This code is most commonly reported on 2017-2022 Volvo V90 Cross Country, with repair costs ranging from $200 to $800.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose ECM-940A, 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
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
FAQ
What does ECM-940A mean?
ECM-940A stands for "Engine Control Module Fault (Volvo)." Volvo-specific engine control module diagnostic code. Indicates an ECM-detected performance issue.
What are the most common causes of ECM-940A?
The most common causes of ECM-940A are: ECM internal fault, Sensor input error, Software update needed, Wiring issue, Environmental condition affecting sensor. The specific cause varies by vehicle.
How much does it cost to fix ECM-940A?
Repair costs for ECM-940A range from $200 to $800, depending on the vehicle and root cause.
Which vehicles are affected by ECM-940A?
Au7o has documented ECM-940A across 1 vehicle models from 1 manufacturers: Volvo.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.