GM Service Manual Online
For 1990-2009 cars only

Temperature Versus Resistance Engine Coolant Temperature and Intake

ECT and IAT Sensor

°C

°F

OHMS

Temperature vs Resistance Values (Approximate)

130

266

85

120

248

110

110

230

142

100

212

186

90

194

246

80

176

329

70

158

446

60

140

612

50

122

851

45

113

1 009

40

104

1 200

35

95

1 432

30

86

1 715

25

77

2 063

20

68

2 511

15

59

3 075

10

50

3 791

5

41

4 707

0

32

5 887

-5

23

7 419

-10

14

9 426

-15

5

12 078

-20

-4

15 614

-30

-22

26 854

-40

-40

48 153

Temperature Versus Resistance Exhaust Temperature Sensor

°C

°F

OHMS

Temperature vs Resistance Values (Approximate)

1000

1832

849

900

1652

795

800

1472

738

700

1292

679

600

1112

618

500

932

554

450

842

521

400

752

488

350

662

454

300

572

420

250

482

385

200

392

349

150

302

313

100

212

276

50

122

239

25

77

220

0

32

201

-20

-4

185

-40

-40

170