Codes description c1805,c1991,c1998 - 2004 Lincoln LS V8

ABS Module Calibration failure
the car needs to be
all brakes inspected good
and ABS scan tool scanned.
CAN Communication Bus Fault
can bus failures are not good. (and hard to find)
Read more: https://www.autocodes.com/u1900_lincoln.html

C1998 Module Calibration Not Complete ABS Module Go To Pinpoint Test M .

Have to restart what ? Vehicle ? Did you have the system check for code's ?
The four wheel air suspension system is comprised of the following components:

• Service switch
• Control module
• Two front height sensors
• One rear height sensor
• Compressor and drier assembly (includes vent solenoid)
• Air lines
• Front and rear air spring and shock absorber assemblies
• Four air spring solenoids
• Compressor relay
• Vehicle Dynamic Module (VDM) Diagnostic Trouble Code (DTC) Index NOTE: Repair all other DTCs before C1725 and C1726. Repair DTCs C1990 and C1991 last. DTCs Description Source Action B1317 Battery voltage high VDM Go To Pinpoint Test C . B1318 Battery voltage low VDM Go To Pinpoint Test C . B1342 ECU is defective VDM INSTALL a new VDM. REFER to Air Suspension Control Module in this section. SET the ride height. REFER to Ride Height Adjustments in this section. CARRY OUT the pneumatic test. TEST the system for normal operation. B2477 VAPS II steering assist curve not complete VDM REFER to Section 211-00 . C1445 Vehicle speed signal circuit failure VDM GO to Symptom Chart . C1724 Air suspension height sensor power circuit failure VDM Go To Pinpoint Test D . C1725 Air suspension front pneumatic failure VDM Go To Pinpoint Test E . C1726 Air suspension rear pneumatic failure VDM Go To Pinpoint Test E . C1760 Air suspension rear height sensor signal circuit failure VDM Go To Pinpoint Test F . C1770 Air suspension vent solenoid output circuit failure VDM Go To Pinpoint Test G . C1790 Air suspension LR air spring/shock solenoid output circuit failure VDM Go To Pinpoint Test H . C1795 Air suspension RR air spring/shock solenoid output circuit failure VDM Go To Pinpoint Test H . C1830 Air suspension compressor relay circuit failure VDM Go To Pinpoint Test I . C1840 Air suspension disable switch circuit failure VDM Go To Pinpoint Test J . C1873 Air suspension RF air spring solenoid output circuit failure VDM Go To Pinpoint Test H . C1877 Air suspension LF air spring solenoid output circuit failure VDM Go To Pinpoint Test H . C1881 Air suspension RF height sensor circuit failure VDM Go To Pinpoint Test F . C1889 Air suspension LF height sensor circuit failure VDM Go To Pinpoint Test F . C1897 Steering VAPS circuit loop failure VDM REFER to Section 211-00 . C1964 Air suspension compressor actual run time exceeded allowed run time VDM Allow the air compressor to cool down. CLEAR the DTC. REPEAT the self-test. C1990 New control module initialization (requires ride height calibration and pneumatic test pass) VDM REFER to "Clearing DTC C1990 or C1991". C1991 Plant ride height setting and/or tests incomplete VDM REFER to "Clearing DTC C1990 or C1991".

Search Results

C1805 - Engine-Codes.com

engine-codes.com/c1805.html
Possible Causes and Repair Information for C1805 code. Learn what does C1805means? C1805 Mismatched PCM and/or ABS-TC Mod.

This one has to be cleared with a scanner. A code reader won' clear an ABS code.

Have you changed anything recently? This is related to the ABS module and PCM mismatching. Have you replaced a tire recently or rims or brakes? If you have different sized tires on the front than you do on the rear it will throw this code, causing the ABS light to come on

Go to Advance Auto and get them to put their code reader on it. Their readers not only tell a person the code, but suggest what to check as well. If you like, you can snap pictures of the suggested trouble shooting.

first check brake fluid level then you will have to test the wheel speed sensors that the codes refer to. when there is a sensor problem it will activate both the abs and traction control lights. the red brake light comes on when there is low fluid condition(leak),worn brakes that need servicing. also if there is a abs module problem it can set codes. you need to know what the codes mean this is a starting place to diagnoise.

these codes are strange. the p1246 is alternator load input. try resetting and erase all codes. you can do this with your obd2 or disconnect battery for 10 minutes and reconnect. run car and see if codes reappear. alternator output should be 13-15 volts running.

The traction module needs reflashed.