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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

O2 Sensor - Troubleshooting

Group: 25

Number: 82-01

Date: May 11, 1982

Subject: Oxygen Sensor

Key Points: Troubleshooting

Part Identifier: 25 10








If hard starting, stalling, poor running, fluctuating idle speed, or poor fuel economy conditions occur, use the troubleshooting charts in the accompanying illustrations to check out electrical wiring and oxygen sensor circuits.





Electronic Control Unit Pin Numbers













Electronic Control Unit Pin-Out Tests

Note:
For overall current flow diagram on Rabbit/Pickup carburetor equipped cars, see Supplement 27.


For tests and adjustments on the carburetor, see Supplement 47.