Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Oxygen Sensor


Oxygen Sensor Heater Resistance 3 ohms (cold) 13 ohms (hot)
Oxygen Sensor Operating Voltage (engine running) 0.4 - 1.0 volts
Oxygen Sensor Heating Element current draw 0.5 - 1.3 A


Tune-up Specifications

Firing Order 1-5-4-8-6-3-7-2
Idle Speed 500-600 RPM [1]
Timing 5 ±2° BTDC [2]
Air/fuel Mixture Readout oscillating [3]

[1] Automatic Transmission in Drive
[2] Reference figure at cranking speed only, not adjustable
[3] At Diagnostic socket, with on/off ratio tester, and O2 sensor connected