OK, I have a huge list of error codes and could really use some help with deciphering them if possible. I have a 96 Ford Ranger w/3.0 automatic transmission and it is also 4x4. I received the following code errors. P0340, P1443, P0401, P1701, P1270. One I was able to find out was the camshaft position sensor, so I replaced it today. I can't seem to find what the other codes are and what to do about them. Any help would be great.

 

P1443 - EVAP Control System Canister Purge Valve (Mechanical) Malfunction

P1270 - Engine RPM/Vehicle Speed Limiter

P0401 - EGR Flow Insufficient Detected

P1701 - ?? Not a PCM code; it might be a tranny code or something.

If you are looking for information on how to address the P1443 and P0401 codes (and DTCs in general) you will find it in the 3.0L V6 Technical Info & Tips Sticky Thread located at the top of this forum. Look under the "Components & Sensors" heading. The P0401 code is probably your DPFE sensor.

As for the code P1270, it just means you went too fast or over-revved the engine. Your 3.0L engine, by virtue of the PCM's program, has both a speed and a RPM governor built in. Just erase the code and slow down.

 

How do i figure out where to begin with the 0401 and the 1443 code? Should i start with a new EGR valve or elsewhere?

 

Wow you have a handful. When you replaced the cps sensor, did you look at the shaft to see if the half round interrupter was still there? Was the plastic sensor "wiped out"? If so, the entire shaft has to be replaced. 1443 is the purge valve, and I am working on the same problem. If you go to obdII.com you can probably find the codes, or they will have some links to fine them. Back to the camshaft sensor. There are lots of posts here about it. That would be a good start. If you find out anything about the purge valve, I would be interested. Thanks and good luck.

 

A little more on the 401 and 1443 codes:

- Evaporative Emissions Control Valve (EVAP)

- P0401 EGR flow insufficient & DPFE

 

well thus far i've replaced the egr/dpfe sensor and the cms sensor. Yes the entire sensor was "wiped out", the metal tab inside the sensor was broken into many pieces. I didn't think to check the shaft, but i will pull the sensor and check it to see if there is any damage to it to double check the shaft being bad. As far as the EVAP purge code...where do you even start to figure that out? How do you clean an EGR valve? Its cold here and when i first start the truck up the fast idle doesnt kick in...could that be the IAC Sensor?

 

I also had the CEL on all the time and through ready all the posts and threads on this forum I decided to try replacing the DPFE (from autozone $59.99) and the light hasn't been on now for over 200 miles now. Many thanks to F.T.E. you saved me a lot of money at a repair shop!!!

 

Welcome to FTE!

Glad to hear you fixed the problem.

 

Just wanted to thank you guys i have a 96 ranger with the p1443 code showing up and didnt know what it was but now i know where to start. when i bought the truck the vacume lines ti the canister were unhooked, i hooked them back up but still get the code after resetting the computer. I also occationaly have a faint gas odor in the engine comp what dose that mean? thanks for any help you can give me .

 

With regard to the P1443 EVAP code, these are generally the things you want to consider:

- Improperly installed fuel filler cap.
- Loose or disconnected components.
- Damaged/pinched lines or hoses.
- Damaged evaporative emission test port.
- Damaged EVAP canister or vent solenoid.
- Damaged fuel vapor vent valve or assembly.
- Loose or disconnected EVAP return tube.
- Fuel overfilling residue.

The main testing procedure of the EVAP system involves applying vacuum to the entire system and monitoring the various components/connections for leaks:

Leak Test — Evaporative Emission System

CAUTION: The evaporative emission system must not be pressurized to more than 3.48 kPa (14 inches/H2O) or damage to the evaporative emission system may occur.

Note: The ignition system must be in the key ON and engine OFF position.

1. Connect the Evaporative Emission System Leak Tester [or a hand-operated vacuum/pressure pump] to the evaporative emission test port.

2. Apply 12 volts to the canister vent solenoid.

3. Pressurize the evaporative emission system to 3.48 kPa (14 inches/H2O).

4. Monitor the system for two minutes. The system fails the Leak Test if the pressure falls below 2.0 kPa (8 inches/H2O).

5. Repair any leaks as required.

6. Repeat the Leak Test-Evaporative Emission System until the system remains above 2.0 kPa (8 inches/H2O) after the two-minute test period.

 

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