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
(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)
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O2 Sensor Signal Fault
Test 1 - Test 4:
Test 5 - Test 8:
Test 9:
SYMPTOM P2090-O2 SENSOR SIGNAL FAULT
TEST NOTE This symptom is diagnosed using the test P2026-O2 SENSOR CIRCUIT FAULT.
POSSIBLE CAUSES -
Checking circuit integrity
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ECM
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O2 sensor
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O2 sensor circuit short to ground
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O2 sensor circuit short to voltage
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O2 sensor circuit short together
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O2 sensor open circuit
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Power supply open
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Intermittent condition
