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Sensor Range Charts

Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a trouble code, but it may cause driveability problems.

NOTE: Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
CAMSHAFT POSITION (CMP) SENSOR RESISTANCE (1)

Temperature Ohms
77°F (25°C) 166.5-203.5
(1) Measure resistance with ignition off.
CRANKSHAFT POSITION (CKP) SENSOR RESISTANCE (1)

Temperature Ohms
68°F (20°F) 470-570
(1) Measure resistance with ignition off.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE (1)

Temperature Ohms
68°F (20°C) 2100-2900
122°F (50°C) 680-1000
194°F (90°C) 236-260
(1) Measure resistance across sensor terminals.
EGR TEMPERATURE SENSOR RESISTANCE (1)

Temperature Ohms
32 (0) (2) 7.9-9.7
122 (50) (2) .57-70
212 (100) (2) .08-1.0
(1) Heat sensor in water and measure resistance across sensor terminals.
(2) Megohms are given.
HEATED OXYGEN SENSOR (HO2S) VOLTAGE (1)

Condition Volts
Lean 0-0.3
Rich 0.6-1.0
(1) Measure voltage between HO2S center terminal and ground, voltage should continuously change.
HEATED OXYGEN SENSOR (HO2S) RESISTANCE @ 77°F (25°C)

Condition Ohms
Front & Rear (1) 2.3-4.3
(1) Measure resistance between HO2S outer terminals. Continuity should not exist between center terminal and outer terminals.
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE (1)

Temperature Ohms
68°F (20°C) 2100-2900
176°F (80°C) 270-380
(1) Measure resistance across sensor terminals.
THROTTLE POSITION (TP) SENSOR RESISTANCE

Application (1) Ohms
Completely Released 700
Partially Released 700-5000
Completely Depressed 5000
(1) Approximate values are given. See ADJUSTMENTS article for TP sensor connector terminal identification.
SECONDARY TP SENSOR SPECIFICATIONS

Secondary Throttle Valve Position Ohms Volts
Fully Open About 3000-5800 4.4-4.6
Partially Open 800-5800 0.4-4.6
Fully Closed About 800 0.4 Or More
MASS AIRFLOW (MAF) SENSOR VOLTAGE SPECIFICATIONS (1)

Application Power Supply Volts Output Supply Volts
Q45 11.0-14.0 1.0-1.7
(1) For test procedures, see DTC P0100 - MASS AIRFLOW (MAF) SENSOR in appropriate TESTS W/CODES article.
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