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Code P 1684 and P 2074

 
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Old 24 Apr 2018, 10:55 pm
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Join Date: Jan 2016
Posts: 23
Default Code P 1684 and P 2074

Hello, I have a 2005 Turbo 2.4 Vin E...
Had engine code 0301( misfire Cyl 1). Installed new plugs, wires and coil pack.


On first start engine light on right away, drove for about 20 miles and ran ok but a slight rough.

0301 gone but now P 1684 and 2074 appeared.

Did I forget to plug something back in or???

Thanks,
Paul
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Old 25 Apr 2018, 01:29 am
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Join Date: Aug 2014
Location: Thousand Oaks, CA
Posts: 7,473
Default Re: Code P 1684 and P 2074

Quote:
Originally Posted by paulwells77 View Post
Hello, I have a 2005 Turbo 2.4 Vin E...
Had engine code 0301( misfire Cyl 1). Installed new plugs, wires and coil pack.


On first start engine light on right away, drove for about 20 miles and ran ok but a slight rough.

0301 gone but now P 1684 and 2074 appeared.

Did I forget to plug something back in or???

Thanks,
Paul
P0274 = Manifold Pressure / Throttle Position Correlation; High Flow & Vacuum Leak

Possible Causes:

1. Vacuum leak in hoses or component connections
2. High resistance or resistance to ground in MAP 5 volt supply or signal circuit
3. MAP Sensor has failed
4. High resistance in MAP ground circuit
5. Throttle Position Sensor has failed or is improperly adjusted
6. High resistance or resistance to ground in Throttle Position Sensor 5 volt supply or signal circuit
7. High resistance in Throttle Position Sensor ground circuit
8. PCM has failed

Check all the hoses.

1. Inspect the Intake Manifold for leaks and cracks.
2. Inspect the Power Brake Booster for any vacuum leaks.
3. Inspect the PCV system for proper operation or any vacuum leaks.
4. Check all hoses on the turbo.
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Last edited by ptcruisersteve; 25 Apr 2018 at 01:32 am.
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Old 25 Apr 2018, 01:07 pm
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Join Date: Jan 2016
Posts: 23
Default Re: Code P 1684 and P 2074

Thank you PT Cruiser Steve !
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Old 25 Apr 2018, 05:47 pm
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Join Date: Jan 2016
Posts: 23
Default Re: Code P 1684 and P 2074

I did this work yesterday (Tues.) 4/24.

So this morning I go out and start the car and....no engine light, so I drove for about 30 miles with a couple of stops...still no engine light.
How does that happen just sitting overnight???
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