P0356 on 1997-2008 Ford F-150 — Ignition Coil F Primary/Secondary Circuit Malfunction
1 vehicles · 1 makes · $200-$800 repair
Most Reported On
P0356 is an OBD-II diagnostic trouble code meaning “Ignition Coil F Primary/Secondary Circuit Malfunction.” The ECM/PCM detected a primary or secondary circuit fault on ignition coil 'F' (6+ cylinder engines). The expected coil pulse/feedback was missing or invalid, pointing to the coil, its wiring/connector, or its PCM driver. This code is most commonly reported on 1997-2008 Ford F-150, 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 P0356, 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 P0356 mean?
P0356 stands for "Ignition Coil F Primary/Secondary Circuit Malfunction." The ECM/PCM detected a primary or secondary circuit fault on ignition coil 'F' (6+ cylinder engines). The expected coil pulse/feedback was missing or invalid, pointing to the coil, its wiring/connector, or its PCM driver.
What are the most common causes of P0356?
The most common causes of P0356 are: Faulty ignition coil 'F', Open/short in primary or secondary wiring, Corroded or loose coil connector, Bad spark plug overloading the coil, Failed coil driver in the PCM. The specific cause varies by vehicle.
How much does it cost to fix P0356?
Repair costs for P0356 range from $200 to $800, depending on the vehicle and root cause.
Which vehicles are affected by P0356?
Au7o has documented P0356 across 1 vehicle models from 1 manufacturers: Ford.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.