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2003 chevy truck goes in limp mode
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Xs1200sd
I love my Chevy Chevette!
| Posts: 1
| Joined: 10/09
Posted: 10/15/09
08:54 AM
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My 2003 truck 1/2 ton ext cab 5.3. From Texas, went to Colorado, truck would go into limp mode at altitude, engine light would come on. Stop the truck cut it off, wait 30 sec crank it up and run good. Got to lower alt. it ran fine, light went off. 2 weeks later it did the same thing leaving the house 1/4 mile down the road. It gives a 15 and 16 code/chevy dealer. The Chevy dealer reprogramed it in Steam Boat Springe Col. 26 miles it started the same thing. I have a 180 degrese thermostat in it. Have 184,000 miles, boesn't use any oil, good com. pull a 29' travel trailer, it doesn't run hot, have oil cooler, trans cooler. Any help would be greatly appreciated. The dealer could not find any broken wires or connections. 
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waynep7122
V-6 Camaros rule!
| Posts: 74
| Joined: 08/09
Posted: 10/15/09
05:43 PM
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throw out the 180F thermostat.. put the 195F back in... the engine needs to run at the prescribed operating temp.. controlled by the 195F thermostat.. the ecm does not understand why the coolant is not coming up to temp..
http://www.obd-codes.com/trouble_codes/
DTC Codes - P0100-P0199 - Fuel and Air Metering
P0105 Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction
P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem
P0107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
P0108 Manifold Absolute Pressure/Barometric Pressure Circuit High Input
P0109 Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent
P0109 Intake Air Temperature Circuit Malfunction
P0111 Intake Air Temperature Circuit Range/Performance Problem
P0112 Intake Air Temperature Circuit Low Input
P0113 Intake Air Temperature Circuit High Input
P0114 Intake Air Temperature Circuit Intermittent
P0115 Engine Coolant Temperature Circuit Malfunction
P0116 Engine Coolant Temperature Circuit Range/Performance Problem
P0117 Engine Coolant Temperature Circuit Low Input
P0118 Engine Coolant Temperature Circuit High Input
P0119 Engine Coolant Temperature Circuit Intermittent
it could also need the coolant temp sensor connector pigtail replaced.. the wires do fatigue do to the changes in wind speed from the fan...
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