Stuck in 3rd gear limp mode after 1 minute of driving. Also speed gauge shows that im going 20-30 mph faster than i am. For example at 60 MPH it shows i'm going 90 MPH :) Code p0401 (EGR valve issue aka exhaust gas recirculation valve issue) I don't think that could be the problem. Then I have p0736, p0733, p0732, p0734 (they all say gear 1,2,3,4 and reverse are incorrect), I'm think replace the speed sensors on the top of transmission, if that doesn't fix it, then the shift solenoid which is called control solenoid for this particular vehicle. Any helpful thoughts anyone?
Don't you think it is strange that you have so many gear shift codes? I think that the neutral safety switch is defective. Don't ignore the EGR issue. Just as fuel pressure and exhaust back pressure can affect engine performance, so can the EGR valve. Please write back with any additional information or symptoms, and I'll do my best to help you, good luck.
Testimonial: "thanks, ya its a 4 speed. They could all trigger because the speed sensors are off by 20-30MPH. I ordered the speed sensors, I'll let you know if that fixes anything. If not I'll get the EGR solenoid and valve, but those cost as much as the control solenoid (shift solenoid)."
I've been thinking more about your situation and I know that you already bought the input and output speed sensors. If this repair does not solve your problem take a look at your trani fluid level and the last time it was serviced. The fact that the failure is affecting all the forward and reverse gears. In one hand I can agree with you but in the other hand. The symptoms are that all the gears are being affected. The consistancies make me feel like what ever has failed is something that will affect all the gears. Speed sensor/s, trani fluid (level, flow, temp., and condition), clogged air and fuel filter, restriction inside the exhaust (blockage inside CAT.), change in air/fuel ratio, or damage to the PCM. As always, good luck and "YES" please write back with your progress and any new questions that you may have.
well put in the speed sensors with no avail except now the only code I have is speed sensor is bad. and I can manually down shift, instead of being stuck in 3rd but now the speedometer doesn't work at all either and its still in limp mode and wont go into 4th gear
the transmission fluid smells spent and I'm thinking about changing it but If I may have to put another transmission in, I might as well wait. any ideas if spent fluid will make it go into limp mode?
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