P0208 code definition
Injector Circuit Malfunction - Cylinder 8
What the P0208 code means
P0208 is set when the Engine Control Module (ECM) detects voltage or resistance that is out of range in the cylinder 8 fuel injector circuit.
This code is similar to codes P0200 - P0207, and P0209 - P0212, which all indicate fuel injector circuit issues.
What causes the P0208 code?
- Open or short in wiring harness
- Poor electrical connection
- ECM has failed or is failing
- Faulty cylinder 8 injector
What are the symptoms of the P0208 code?
Check Engine Light is triggered by the ECM and observed on the dashboard after the fault is detected
Failsafe mode (precaution to prevent damage to the vehicle) is enacted by the ECM
Failsafe mode remains in effect until the circuit has performance that is within range or the fault is repaired
Lack of engine power
Poor gas mileage
Engine dies and cannot be restarted
Rich and lean conditions.
How does a mechanic diagnose the P0208 code?
Installs a scan tool into the diagnostic link connector (DLC) port of the car and scans for any codes stored in the ECM (each code will have freeze frame data which tells technicians what conditions the code was set under)
Clears all codes and performs a road test to verify the malfunction (if the vehicle can be driven)
Performs a visual inspection for any damage such as broken or loose wires and connections
Uses the scan tool to check voltage and resistance of the cylinder 8 fuel injector circuit as seen by the ECU (a multimeter will be used to check for voltage at the injector itself)
If these results test fine:
Installs a noid light into the wiring for the cylinder 8 fuel injector to check for the proper voltage pulse width
Tests the ECM to manufacturer specifications, if needed
Common mistakes when diagnosing the P0208 code
Any time a step is skipped or not completed in order, it allows an opportunity for diagnosing the wrong component. This wastes valuable time and money. A fuel injector is the most common cause, but the system must be thoroughly tested before it is replaced.
How serious is the P0208 code?
When the vehicle runs poorly or has drivability issues, care should be taken and a qualified technician should be contacted as soon as possible. Symptoms such as these can make the vehicle unsafe to drive until it is repaired.
What repairs can fix the P0208 code?
- Replacing the ECM
- Replacing the cylinder 8 fuel injector
- Repairing the wiring harness
- Fixing connection issues
Additional comments for consideration regarding the P0208 code
As vehicles age, particles can build up in the fuel system. These particles can be made up of dirt, varnish, and contamination inside the gasoline. In some scenarios, cleaning the fuel system may allow the fuel injector to operate properly without needing to be replaced.
Scan tools with professional features such as live data stream, graphing functions, and the ability to view data over time will be important for diagnosing P0208. This is especially true if the issue is intermittent, as these can be pesky to track down without the proper tools.
Noid lights are used to check the voltage pulse that operates the fuel injector. The pulses tell technicians much more than just checking for battery voltage at the cylinder 8 injector itself. Sometimes the voltage may appear fine, but the pulse width is not enough for the injector to operate.
Need help with a P0208 code?
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