Engine/Transmission (1998.5 - 2002) MAP sensor failures in 24 valve trucks

[Gary - K7GLD]

I'm wondering if the OEM MAP sensors are more likely to fail with higher than stock turbo boost? Let's try a poll and see whether or not MAP failures show a greater incidence at higher boost levels!

 

[Tom W]

Gary: Have you had a MAP or IAT faillure. If so, what are the symptoms? I cleaned mine and have noticed no difference. I have had a little more smoke than previously and was wondering if this might be the cause.

 

[Gary - K7GLD]

Gary: Have you had a MAP or IAT faillure. If so, what are the symptoms? I cleaned mine and have noticed no difference. I have had a little more smoke than previously and was wondering if this might be the cause.

Mine (MAP) appears to be failing - I'm getting occasional P0237 error codes, all while the engine is at an idle, or on startup - seems to be getting worse, and regardless of use/engagement of the Smarty or Comp. I've had the MAP sensor out of mine, looks clean, but nothing there to actually get to and clean or visually check.



I'm wondering if these MAP sensors might be more likely to fail with higher than stock boost pressures - I sometimes see 34 PSI or so when towing - and guys running dual turbo setups often see 40 PSI and more. So, I wonder what the physical internal construction of a MAP sensor is like - and will higher than OEM boost eventually damage it? If so, what can be done to somehow limit/control the PSI it is exposed to?



These things CAN cost as high as nearly $200, depending on where you buy them, so some investigation might be worthwhile...



(EDIT!)



OH, and symptoms on mine, other than the error codes set and the CES light, are temporary reduction in power - perhaps the "Limp home" mode? I'd sure hate to get caught towing out on the mountains a long ways from home, and have to drive it like that!

 

[HookMeUp]

Gary I had to replace mine within the last 6 months. Got here was only about $43 plus $11 for an adaptor.



Cummins Sensors

 

[PRout]

At 150k miles, no "known" problems w/ the map sensor here. Have never touched it except for fiddling with different "box" connections. Have to admit I have abused the stock HX35 and before adding the adjustable boost elbow have seen 42 psi of boost and now have it set at 38 max which it has seen several times, but never held it up there. Usually am just taking it easy and under 10psi mostly running about 4 psi on the freeway. .

Hope your good deal worked out on the sensor. Im thinking of getting an extra along w/ and IAT to keep in the truck as spares for the road.

Good Luck!

 

[Gary - K7GLD]

Gary I had to replace mine within the last 6 months. Got here was only about $43 plus $11 for an adaptor.



Cummins Sensors

Looks like their price took a 50% jump since you got yours! :{



But still lots better than what Cummins or DC wants...



Thanks for the pointer - like Phil, I might pick one up for a spare.

 

[NIsaacs]

Gary I had to replace mine within the last 6 months. Got here was only about $43 plus $11 for an adaptor.



How come the adapter?



I have 120,000 miles with mild mods, not problems yet. I did have my first EZ fail with codes and CEL. When it would "act" up, it seemed to be running in stock power.





"NICK"

 

[HookMeUp]

Gary I had to replace mine within the last 6 months. Got here was only about $43 plus $11 for an adaptor.



How come the adapter?



I have 120,000 miles with mild mods, not problems yet. I did have my first EZ fail with codes and CEL. When it would "act" up, it seemed to be running in stock power.





"NICK"

Need the adapter because they quit making the ones for the 2002's. It uses one for a 2001 and you need an adapter to make it work. That' why the dealer's are charging $200+ a pop for them plus the $38 for the adapter. Imagine that they have to stock less, but they charge you more for it???

 

[Timbeaux38]

The Map sensor can read up to 50 PSI. I dont think 40 will kill one any sooner. They just seem to wear out over time.

 

[Gary - K7GLD]

The Map sensor can read up to 50 PSI. I dont think 40 will kill one any sooner. They just seem to wear out over time.

Good to hear, if accurate - where did you get that info?