Fuel Injection Timing Solenoid Open/Short (Volkswagen)
What does P1186 mean?
The P1186 code means the vehicle's onboard diagnostic system has detected: Fuel Injection Timing Solenoid Open/Short (Volkswagen). This is a critical severity code.
Common Symptoms
- Check Engine Light on
- Engine running very rough or not starting
- Severe loss of power
- Excessive exhaust smoke
- Engine knocking or pinging
Probable Causes (Ranked by Likelihood)
- Failed fuel injection timing solenoid Very High
- Open or short in solenoid wiring High
- Corroded solenoid connector Moderate
- Timing chain stretch affecting injection timing Moderate
- ECM driver circuit failure Low
Step-by-Step Diagnostic Procedure
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Test the fuel injection timing solenoid resistance with a multimeter
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Inspect the solenoid connector and wiring for damage
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Check for VW technical service bulletins related to the timing system
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Verify timing chain condition using camshaft/crankshaft correlation data
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Replace the solenoid if electrically failed
Frequently Asked Questions
Is P1186 related to the VW timing chain problem?
P1186 can be related to timing chain issues on VW 2.0T TSI engines. The timing solenoid and timing chain system work together. A stretched chain can put extra stress on the solenoid and vice versa.
Can I drive with P1186?
No. This is a critical code. Incorrect fuel injection timing can cause severe engine damage, including valve damage and piston scoring. Have the vehicle towed to a repair facility.
Is this covered under the VW timing chain extended warranty?
Some VW models had extended warranty coverage for timing chain related issues. Contact your VW dealer with your VIN to check if your vehicle qualifies for any applicable warranty extensions or recalls.