Question about Cars & Trucks
P1800 current code clears, pending code clears with scanner.. sometimes
Pending codes and current codes are basically the same. Pending codes are for a problem that is still indicated to be a problem,but hasn't been cleared. Current codes are codes that are indicated for the current drive cycle. Usually will both be the same code if problem still exists and hasn't been cleared without repair.
Posted on Jun 14, 2014
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Posted on Jan 02, 2017
Engine torque signal malfunction
Threshold Value ~ Circuit continuity: Open or shorted
Enable Conditions ~ NA
Time Requirements ~ Continuous
MIL Illumination ~ No MIL illumination
1)Open between TCM (C221-41) and ECM (C254-68).
2)Short to B+ or GND between C221-41 and C254-68.
With ignition off, disconnect C254 from ECM and C221 from TCM. Measure resistance between C221-41 and C254-68 (less than 1 ohm).
Is resistance as specified?
Go to step 2.
Locate source of open or high resistance and repair as necessary.
Measure resistance between C254-68 and GND (infinite resistance).
Is resistance as specified?
Go to step 3.
Locate source of short to GND and repair as necessary.
Turn ignition on and measure voltage at C254-68 (0v).
Is voltage as specified?
Thoroughly check for loose, bent or corroded terminals in circuit than go to step 4.
Locate source of short to B+ and repair as necessary.
Clear codes and return vehicle to original condition. Verify any repairs by driving vehicle with KIA Data Pro connected to OBD-II connector and monitoring for pending codes (refer to section 3 of the KIA Data Pro Generic OBD-II Program Card reference manual).
Posted on May 29, 2010
Sounds like the low tire pressure indicator. Check the air pressure in all 4 tires. If thats not the problem then it could be a sensor gone bad. Cold weather sometimes plays havoc with the tire pressure
Posted on Feb 23, 2012
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