Erratic Fuel Gauge Readings, Fuel Gauge Reads Empty When There Is Fuel In Tank, DTC P0463 Set, Service Fuel System Message Displayed (Replace Left Fuel Tank Level Sensor)
| Subject: | Erratic Fuel Gauge Readings, Fuel Gauge Reads Empty When There Is Fuel In Tank, DTC P0463 Set, Service Fuel System Message Displayed (Replace Left Fuel Tank Level Sensor) |
| Models: | 2004-2005 Cadillac XLR |
| 2003 Chevrolet Corvette (Built After December 2002) |
| 2004-2005 Chevrolet Corvette |
| Built Prior to December 2004 |
| Attention: | For the 2003 Chevrolet Corvette, this bulletin only applies to vehicles with the FFS fuel system. |
This bulletin is being revised to correct an add condition within the Warranty Information. Please discard Corporate Bulletin Number 05-06-04-041 (Section 06 -- Engine).
Condition
Some customers may comment that the fuel gauge is erratic or reads empty when there is fuel in the tank. Also, the driver information center may display "Service Fuel System."
Upon investigation, the technician may find DTC P0463 set.
Cause
This condition may be due to the following causes:
| • | The sender card has insufficient ink and looses electrical contact when the tank is over filled. |
| • | Loose or poor connections at the PCM. |
Correction
Check the connections at the PCM/ECM using the proper pin drag test. Use care to select the proper pin for testing. Refer to PCM/ECM Connector End Views in SI in order to identify the correct pin. If all connections check good, then replace the left fuel tank level sensor with P/N 88967316. Refer to the Left Fuel Level Sensor Replacement procedure in the Engine Controls sub-section of the Service Manual (SI Document ID #1398504 [Corvette] or Document ID #976863 [XLR]).
Right fuel tank senders are rarely faulty and should only be replaced if diagnostic information specifically indicates replacement of the right fuel tank sender or a DTC P2068 is present.
Parts Information
Part Number | Description |
|---|---|
88967316 | Sensor Kit, Fuel Level (LH) |
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
L1197* | Sensor, Fuel Level (Tank Unit) -- Replace | 6.0 hrs |
Add | Diagnosis Time | 0.0-0.3 hr |
Add: (2003- 2004 Z06 Corvette and All 2005 Corvette Only) | To Remove Brake Cooling Ducts | 0.2 hr |
Add: (Corvette Only) | With Automatic Transmission | 0.3 hr |
*This is a new labor operation number. The next update of the Labor Time Guide will contain this change. | ||
