Guys,

My '02 F150 had the following happen today:

Engine began running rough and transmission would not shift. The service engine soon light was solid and the overdrive indicator on the gear selector was flashing. The following DTCs were found:

P0443
P1451
P0750
P0758
P1760
P1000
P0755
P0743
P0740
P0753

When I was in park, the engine would idle smoothly, but when I applied just a slight amount of gas, the engine ran extremely rough. It seems to be engine related.....

If anyone has any ideas, it would be greatly appreciated!

Thanks in advance.

 

Hmmm... interesting... there is a DTC list at the beginning of the Engine Thread section... but it is incomplete.

Anyhow, I'll help ya.

P0443 Evaporative Emission System Purge Control Valve Circuit
P1451 EVAP Control System Canister Vent Solenoid Circuit Malfunction
P0750 Shift Solenoid A malfunction
P0758 Shift Solenoid B Electrical
P1000 On-Board Diagnostic (OBD) Systems Readiness Test Not Complete
P0755 Shift Solenoid B Malfunction
P0743 Torque Converter Clutch Circuit Electrical
P0740 Torque Converter Clutch Circuit Mal****ion
P0753 Shift Solenoid A Electrical

 

In your opinion, does this sound like an emissions system problem?

Thanks!

 

LOL - Yea , it's very incomplete - in fact , it BLOWS!! Shouldn't even be a sticky IMO..

Much better one here -

http://www.svtlightnings.com/scantoo...tc%20codes.htm

 

Guys,

Thanks for the info! Since the engine is running rough when giving the engine some gas in park, do you guys think the problem is with the emissions system? I just replaced the PCV valve about a month ago, but I did not replace the hose elbow that the PCV valve connects to. I used a "genuine" Motorcraft PCV valve. What do you guys think?

 

The most common possible cause with all the codes you have is a wiring problem. Check all the wiring related to the trans and running to the EVAP at the rear. Look for burns, rubs or brakes.

 

Man, I don't know - did something happen ? Not much to go on.

Just all the sudden went buggy ? Nothing happen ? Explain - Try not to leave anything out ..

That harness is on top of the trans - I agree with torkum.

 

Jbrew,

I was just driving home from work when the transmission seemed to begin to slip. I then noticed that the engine was running very rough, so I decided to pull over. The service engine soon light was lit and the overdrive indicator on the shift lever began to flash. While waiting for the tow truck, I started the engine and gave it a little gas. The engine was missing very badly. Once the truck was towed to the dealer, I took my Hypertech programmer and found the diagnostic codes (listed at the beginning of the thread). I have not been under the hood monkeying around with anything. Like I said earlier, I changed the PCV valve about a month ago with a Motorcraft replacement PCV.

I am suspecting the emissions control, but maybe some wires did rub or burn like Torkum said.

Any further ideas?

Thanks for all the valuable input!

 

Not sure if theres any truth to this but i was once told if the overdrive shift indicator flashes it indicates transmission problems. You said the transmission slipping was the first problem you had... Again, not sure if theres any truth to that

 

That's what it means alright


But he has two problems that I think are unrelated - I'm not 100% sure on that . If I'm right , the only thing the EVAP and Trans have in common is that they share the same harness.

Mo Power , post this in the trans forum too - it may help ...

 

It sounds like you may have two problems, There is a common problem with these trucks you may want to check. The wires that go to the overdrive switch on the shifter can sometimes short out on the column right by the boot and it's not hard to pull the column covers and have a look. Whenever the OD lights flash on a Ford with these steering columns 9 out of 10 times the wires have chaffed and shorted, sometimes blowing a fuse for transmission controls.

 

Huh , maybe the EVAP and trans DON'T share the same harness -



I'll see if theres something on the DVD.

 

It has to be one of the sensors on the transmission... I have a feeling it is likely to be electrical.

 

Everthing that controls the trans , I edited some , heres the main ones. -

The following provides a brief description of each of the sensors and actuators used to control transmission operation.

Mass Air Flow (MAF) Sensor

The mass air flow sensor (MAF) measures the mass of air flowing into the engine. The MAF sensor output signal is used by the powertrain control module (PCM) to calculate injector pulse width. For transmission strategies the MAF sensor is used to regulate electronic pressure control EPC, shift and torque converter clutch scheduling.

Output Shaft Speed (OSS) Sensor

The output shaft speed (OSS) sensor is a magnetic pickup, located at the output shaft ring gear, that sends a signal to the powertrain control module to indicate transmission output shaft speed. The OSS is used for torque converter clutch control, shift scheduling and to determine electronic pressure control.

Digital Transmission Range (TR) Sensor

The digital transmission range (TR) sensor is located on the outside of the transmission at the manual lever. The digital TR sensor completes the start circuit in PARK and NEUTRAL, the back-up lamp circuit in REVERSE and the neutral sense circuit (4x4 only) in NEUTRAL. The digital TR sensor also opens and closes a set of four switches that are monitored by the powertrain control module (PCM) to determine the position of the manual lever (P, R, N, D, 2, 1).

Transmission Fluid Temperature (TFT) Sensor

The transmission fluid temperature (TFT) sensor is located on the lead frame assembly near the shift solenoids on the main control valve body. It is a temperature sensitive device called a thermistor. It sends a voltage signal to the PCM. The voltage signal varies with transmission fluid temperature. The PCM uses this signal to determine whether a cold start shift schedule is necessary. The shift schedule is compensated when the transmission fluid temperature is cold. The PCM also inhibits (TCC) operation at low transmission fluid temperatures and corrects electronic pressure control.

Vehicle Speed Sensor (VSS)

The vehicle speed sensor (VSS) is model dependent. Possible sources of vehicle speed input are, anti-lock brake sensor (ABS), a gear-driven vehicle speed sensor (VSS), or the transmission output shaft speed (OSS) sensor. On 4x4 applications with a manual shift transfer case, the transfer case speed sensor is the source of vehicle speed. The VSS signal is either an AC signal whose frequency changes with vehicle speed, or an SCP data message depending on the source. Some vehicles have both. The vehicle speed signal is an input to various vehicle sub-systems such as the powertrain control module (PCM), instrument cluster (speedometer and odometer), speed control systems, etc. The vehicle speed source must be operational to enter output state control mode for diagnostics.

Electronic Pressure Control (EPC) Solenoid

The electronic pressure control (EPC) solenoid regulates transmission pressure. EPC valve pressure is used to control line pressure.

Torque Converter Clutch (TCC) Solenoid

The torque converter clutch (TCC) solenoid is used to control the apply and release of the TCC.

Throttle Position (TP) Sensor

The throttle position (TP) sensor is a potentiometer mounted on the throttle body. The TP sensor detects the position of the throttle plate and sends this information to the powertrain control module (PCM). The TP sensor is used for shift scheduling, electronic pressure control and torque converter clutch (TCC) control.

 

BAD NEWS
https://www.f150online.com/forums/sh...d.php?t=302228