PCM/ECM sets DTC P0116 if the PCM/ECM detects stuck low, high or implausible high ECT signal.
Item | Detecting Condition & Fail Safe | Possible Cause | |
DTC Strategy | Case1 |
•
Signal Stuck Low | 1. Poor connection or damaged harness 2. Faulty ECT sensor 3. Faulty cooling system |
Case2 |
•
Signal Stuck High | ||
Case3 |
•
Signal implausible high | ||
Enable Conditions | Case1 |
•
No relevant failure
•
6V< Battery voltage
•
Coolant temperature at Start < 76℃(169℉) | |
Case2 |
•
No relevant failure
•
11V< Battery voltage <16V
•
Coolant temperature at Start >76℃(169℉)
•
-10℃(14℉)< Intake air temp. <70℃(158℉)
•
-10℃(14℉)< Ambient temperature
•
More than 250 sec. (cumulative) Part Load driving condition(engine rpm >1400,vehicle speed >22 mph and MAF >20 kg/h)
•
More than 200 sec. (cumulative) Low Load driving condition(trailing fuel cut off or idle with vehicle speed <12mph) | ||
Case3 |
•
No relevant failure
•
Oil temp. at engine stop of previous driving cycle >70℃(158℉)
•
Coolant temp. at engine stop of previous driving cycle >70℃(158℉)
•
Oil temp. at start <35℃(95℉)
•
Intake air temp. at start <35℃(95℉) | ||
Threshold Value | Case1 |
•
Modeled coolant temp. increase > Threshold But measured coolant temp. increase < Threshold | |
Case2 |
•
Coolant temperature signal variation since engine Start < 2.25 ℃(4℉) | ||
Case3 |
•
Coolant temperature in start > 53 ℃(127℉)(In case of coolant temp.> threshold but oil temp. & intake air temp < threshold) | ||
Diagnostic Time |
•
Immediate | ||
MIL On Condition |
•
NO MIL ON(DTC only) | ||
