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Fuel and transmission codes P0171, P0174, P0700, P0871 and P0132

Tiny
DEMENTEDPIXIE
  • MEMBER
  • 2004 DODGE INTREPID
  • 2.7L
  • AUTOMATIC
  • 225,000 MILES
I am having several problems and I'm not sure if they are connected.

When cold, the car wants to start hard. It Will crank and roll over, start to catch, then sputter out. Takes between 3-6 key turns for it to fire. Then, it will have no acceleration in first gear. I have to let it idle for about 5 minutes and then go back and forth in the driveway for it to start running normally. Then, suddenly, it will run like a champ. Until it gets warmer.

When the car has been running for about 30 minutes or so and I let it idle, it will start to sputter and choke out after about 3-5 minutes of sitting still. If I get the car moving before it stalls, it will drive fine again. If it stalls, it won't restart for about 20-30 minutes, after the engine has cooled down.

When cold, it throws the codes P0171 and P0174, system too lean. I have cleaned the MAP sensor, replaced all 6 spark plugs, and the O2 sensor in bank 2.

When hot enough to start stalling, the codes are P0700 and P0871 switch c circuit range, plus P0132. Everything I could find for the 871 code had to do with fluid pressure sensors, but when I went to look those parts up, I couldn't find them for my car.

At this point, I cannot afford a large repair bill or to get a different car. What would be the logical next step to take to try to repair this? I currently have a brand new fuel pump sitting in my living room, but want to avoid dropping the gas tank or rebuilding the transmission if I don't have to.
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Monday, August 19th, 2019 AT 6:10 PM

3 Replies

Tiny
94 TRANSAM
  • MECHANIC
  • 680 POSTS
Hi, thank you for visiting 2CarPros. Lets see what we can figure out here.

Let take this one step at a time since we have so many issues, Okay?
Your code 0171 and 0174 as you know is a lean system. I need you to check these things and see what you find.

Vacuum hoses
Air intake boots (lose or torn)
PCV hoses
EGR valves
DISA valves
Intake Manifold gasket is leaking.
A loose dipstick (or one with a broken seal)

Check each one of these for a vacuum leak. All of the above can be easily check by both sound, you will hear a hissing over the motor running. If you cant you can get a can of carburetor cleaner. With the motor running shoot a 1/2 second shot on each area. Give some time between shots for it to evaporate and the fumes to clear so you don't start a fire. Be thorough around the EGR and intake manifold. If the motor speeds up you have found a leak. The vacuum lines you can unplug at the motor and plug the hole on the motor with your finger. If the motor settles down then that line was leaking. Do this on all the lines.

This has to be a major leak or more than one so check all of them even if you find 1 leak.

It could also be a bad Mass Airflow Sensor.
Or engine computer software needs to be updated.

Let me know what you find out.

Rich.
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Monday, August 19th, 2019 AT 9:30 PM
Tiny
DEMENTEDPIXIE
  • MEMBER
  • 2 POSTS
Thank you for your help! This has been an interesting week.

I checked all hoses, valves and manifolds and found no leaks. I was returning the fuel pump to AutoZone and started talking to the manager. He said his wife's car had the same problem and it was almost certain to be the pigtail connecting the map sensor. He took his personal scan tool out and checked the live performance data and found that, sure enough, bad MAP sensor. Also found the PVC valve was causing some oil problems. Today, I finally had time to get the intake manifold off and replace the pigtail, connector, and MAP sensor.

The problem now is that I'm wondering if I did it wrong when it comes to the wires. Car is still running the same, but now the only code it is throwing ia P0108 map sensor/barometric pressure circuit high. Does anyone have any decent tutorials on how to replace these wires? Or advice on what to do from here?
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Sunday, August 25th, 2019 AT 2:09 PM
Tiny
94 TRANSAM
  • MECHANIC
  • 680 POSTS
This is the pinout for the MAP. If you look at the MAP socket for the plug it should be an oval with 1 prong on top, 1 prong one each side and 2 prongs on the bottom. With the 2 prongs pointing at you left to right is, 5v power, Ground, MAP signal. The Grn/Rd is Map signal, black is ground and the last is power.

Here are the troubleshooting steps for a P0108 (Bottom images):

SYMPTOM
P0108-MAP SENSOR HIGH

WHEN MONITORED
Engine speed between 600 to 3500 RPM. TP sensor voltage less than 1.2 volts for greater than 1.7 seconds. Battery voltage greater than 10 volts.

SET CONDITION
The MAP sensor signal voltage is greater than 4.92 volts. One trip fault.

POSSIBLE CAUSES
- MAP sensor voltage above 4.9 Volts
- (K1) MAP signal circuit shorted to (K6) 5 Volt supply circuit
- (K1) MAP signal circuit shorted to battery voltage
- MAP sensor internal failure
- (K1) MAP signal circuit open
- (K4) sensor ground circuit open
- PCM

Let me know how it goes. Rich
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Sunday, August 25th, 2019 AT 5:09 PM

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