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C.E.L. at all? (P0116) Posted by JustinHiFi [Email]  (#829) [Profile/Gallery]
(more from JustinHiFi) on Thu, 1 Oct 2009 18:45:25
In Reply to: Temp guage stopped working (briefly), Paul in ABQ, Thu, 1 Oct 2009 16:58:18 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Did your check engine light come on at all? Trionic 7 will dump the gauge reading to cold if it senses the coolant temp sensor is not reading the correct temperature of the engine. It simulates the correct temp in DICE using the intake air temp and a/f ratio to get an actual value. This value is also sent to the ACC, so will cut out the ac (overheat protection) if this occurs. Usually fault code P0116 will result in Trionic ECM. If so, change the coolant temp sensor and thermostat (use only Genuine Saab parts) Inspect the condition of the upper radiator hose and heater core hose coming from the cylinder head at this time as well. Good time to replace if needed.
JustinHiFi
Here's the info from SAAB...(posted by Saabdoc)
Date June 14, 2006
Subject: Coolant Gauge Drops With DTC P0116 Setting in a Saab 9-5
Models:
1999-2005 Saab 9-5 Sedan
1999-2005 Saab 9-5 Wagon
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
CONDITION/CONCERN:
A technician may find an intermittent check engine light on and coolant temperature gauge drops to cold while driving. There are usually no concerns of loss of heater performance, although it is possible. T7 ECM stores DTC p0116 for coolant temperature sensor performance.
RECOMMENDATION/INSTRUCTIONS:
Have technician replace the engine coolant thermostat. If T7 ECM detects the engine coolant takes to long to heat up, it will set p0116 and MIU will command the temperature gauge to cold.
posted by 72.188....
_______________________________________ JustinHiFi Strictly Saab Inc. Melbourne, FL Current: -1991 900 S-PG MT -2001 9-5 Wagon AT -2006 9-3 SS AT Past: -1964 96 2-Smoke MT -1967 96 v4 MT -1983 900 Turbo MT -1985 900 SPG MT -1988 9000 Turbo Black MT -1988 9000 Turbo White AT -1990 900 SPG Red MT -1990 900 SPG Black MT -1991 9000 Turbo MT -1991 900 SPG Red MT -1992 9000 Griffin AT -2000 9-5 Aero Sedan MT -2001 9-5 Aero Wagon MT -2008 9-3 2.0T Sedan AT
, Thu, 1 Oct 2009 18:45:25 <-- Viewing This Message
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