Hello - Was out over the weekend doing some moderate wheeling. On one of the trails I bent my steering stabilizer on a rock. I bent upwards and impeded the steering until we loosened it and got it back down to where it's suppose to be. It didn't seem to bend anything, more like the stock stabilizer bracket just turned upwards, maybe a little loose, it did dent the stabilizer/shock a little but no leaks. Nothing looked damaged that I could see. Drove home 50 miles and everything seemed fine. Alignment might need done but nothing extreme - stays straight when hands off the wheel. I stopped at car wash yesterday to spray off heavy mud from undercarriage but no water in engine compartment. I loosened the S.S. bracket at home yesterday just to make sure it was exactly vertical like factory. Drove home last night no problems. This morning when I get in there the service engine soon light came on. Seemed to drive fine to work though. Shut it off and restarted it and still have the engine light. Do you think I got water in a sensor underneath? Though it was at least 24 hrs since I washed it off that the light came on. Or maybe the steering is off? Any thoughts would be great.

thanks,
Don

 

What code is it throwing?

 

I didn't get a chance to check the code. Can I do the key back and forth procedure to get the code? I downloaded the code and procedure from Quadratec.

Just thought it was funny for the light to turn on two days after I got back if it was damage from wheeling. I was thinking maybe I got carried away with the pressure washer underneath near a wheel sensor or somthing but the light didn't come on until the next day after washing.

 

Could be that the steering wheel is just off slightly, or you could have tweeked a wheel speed sensor. I have had 2 of them replaced after wheeling under warranty. If you're under warranty, just tell them you were driving to work and the light came on Or it might just go away on its own. As long as the ESP/ brakes are kicking on randomly, it's fine to drive

 

Did the dealer give you a hard time about bigger wheels and tires when repairing? I'm pretty mild running 285/70/17 duratrac on AEV wheels. I was thinking I might have got water in a wheel sensor since I pressure washed that area pretty good. Just weird it didn't come on until this morning. Steering wheel may be a little off center too. Seemed a little off maybe.

 

All dealers are different, but they didn't question anything. First time it was stock, second time 2.5" lift and 35's.

 

Hey. Just got a chance to check the code. I got a p0440 - general evap failure. Do you think it's damaged from wheeling? Service engine didn't come on until two days later though. Do I need to worry about it right away-didn't want to cause any damage, etc. I doubt the dealer will fix it if it's damage from the trail. My girlfriend said she smelled gas yesterday when getting out of passenger side but figured she didn't know what she was talking about. I'm going to get under there tomorrow and check it out. Also still got a pile of mud under there I need to clean if I'm takin it to dealer. Only got 13,909 miles on it so I figure it's probably trail damage. I hit the undercarriage pretty good with the high pressure washer yesterday but doubt that caused any problems. Was in pretty deep mud too. Main thing is want to make sure it's ok to drive since it's my daily driver.

 

P0440-GENERAL EVAP SYSTEM FAILURE


Theory of Operation

The Evap Purge Monitor tests the integrity of the hoses/tube between the throttle body/intake and the fuel tank. The monitor is a two stage test and runs only after the Evap system passes the small leak test. Stage one is non-intrusive. The PCM monitors the purge vapor ratio and the ESM switch closed ratio. If the purge vapor ratio is above a calculated value, the monitor passes. If the ESM switch closed ratio is greater than calculated value when purge flow is greater than a minimum value, the monitor passes. Stage two is an intrusive test and runs only if stage one does not pass. The PCM commands the purge solenoid to flow at a specified rate to force the purge vapor ratio to update. The ratio is compared to a calibrated specification. If it is less than specified, a one trip failure is recorded. This test can detect if the purge hose is off, obstructed, or the purge valve is not operational.


When Monitored:

Engine running after a cold start with the difference between ECT and AAT is less than 10° C (19° F). Fuel Level between 12% and 88% full. Manifold vacuum greater than a calculated minimum value. Ambient Temperature between 4° C and 32° C (39° F and 89° F).

Set Condition:

When the monitor conditions are met, the PCM will ramp in purge flow. If the PCM does not sense an ESM switch closure after a calculated amount of purge flow accumulation, an error is detected. Two Trip Fault. Three good trips to turn off the MIL.

Possible Causes

EVAP PURGE SOLENOID VACUUM SUPPLY

EVAP PURGE HOSE/TUBE AND FRESH AIR FILTER OBSTRUCTION

(Z905) GROUND CIRCUIT OPEN

(K107) ESM SIGNAL CIRCUIT OPEN

EVAPORATIVE EMISSION LEAK

EVAP SYSTEM MONITOR SWITCH

EVAP PURGE SOLENOID

POWERTRAIN CONTROL MODULE (PCM)

 

This happened to me. Same code. A code my dealer said DOESN'T exist even tho it kept coming up on my code reader. I delt with 3 months of crappy work from the dealer but i got all sorts of free parts outta them, even a new gas tank, free! But nothing fixed my check engine light and other problems that came as time went on.....It's site to moisture in the evap sys...leave ur gas cap off all day on a nice day. My problems spotted on the first great wave of this year when it finally dried up
Sent from my obama listening device

 

Check your ESID. White box near canister. Make sure plunger not clogged with mud, of replace it as it is cheap. Make sure you install o ring with it.