Q: What means error fault code p1978

asked by on August 04, 2016

Motor warning light comes on some time .

My car has 230000 miles.
My car has a manual transmission.

Check Engine Light is on Inspection $94.99 - $114.99 Get a Quote

The trouble code you listed is a manufacturer specific code, designated by the P1xxx. I have searched my files and cant find that DTC trouble code. Can you please verify that the code is P1978?

However, if you’d like to have the light looked by a certified technician, consider YourMechanic. They will be able to come to the vehicles location and diagnose the trouble code firsthand.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How do you use cruise control?
Your car is equipped with cruise control – a system that allows you to set a specific speed for the car. Once it’s set, you can take your foot off the gas and the car will maintain that speed. This...
Auxilliary plug not working
I would try plugging the chord in another plug just to make sure it is not the chord. The plugs are rather simple. The sides are the ground and only the very center piece at the very back of the...
Front lower control arm bushings loose
Suspension parts wear over time. The style of your driving, as well as the condition of the local roads, can have a significant effect on the amount of time it takes to wear. The suspension is one big system; it...
Car oil leak
Hello. The oil can leak from any number of places on this engine. The most common places that this engine leaks oil is from the valve cover gaskets, and from the rear main seal. If it is dripping while the...
I replaced the speed output sensor but I still see code P0720
Hello - the P0720 code (https://www.yourmechanic.com/article/p0720-obd-ii-trouble-code-output-speed-sensor-circuit-malfunction-by-brady-klopfer) indicates that the signal from the transmission output speed sensor is at odds with speed signals from other systems (like the wheel speed sensor). Since you replaced the output speed sensor, either the new...
Sound coming from front side left side tire when there are bumps 2010 Toyota RAV4
Hi there - depending on whether the noise (https://www.yourmechanic.com/question/suspension-up-front-makes-a-ton-of-noise-creaks) is more of a "clunk", or a creaking sound, several different steering or suspension components may be involved in this problem. Clunking noises could be worn struts, ball joints or tie...
Back wheels bow out at bottom
Front or rear wheels can bow out for a number of reasons. In alignment terms, we call this negative camber. Camber is the angle of the wheels when looking straight at them from the front or rear. When the tops...
My 2014 ford focus whenni hit the lock button on my remote the beep does not sound and the horn does not work either.
Hello, thank you for writing in. The vehicle has a fuse that is specifically for the horn, and you are going to want to check that first. If the fuse is blown, it is a simple fix in which you...
Red lighting bolt came on while driving loss of performance now cant start car ive tried bout everything to start car etc throttle
The warning light refers to the electronic throttle control system. An advanced scanner would reveal some diagnostic clues, if any codes were stored. With regard to this model, reported fixes have included replacing the thermostat (the thermostat is electrically "linked"...

Related articles

P0865 OBD-II Trouble Code: TCM Communication Circuit Low
P0865 means there is an issue with a communication circuit in the traction control module, likely due to a defective ON/OFF switch.
P0835 OBD-II Trouble Code: Clutch Pedal Switch B Circuit High
P0835 means there is an issue with the clutch position sensor circuit, possibly due to a defective or misadjusted sensor, or faulty wiring.
B1996 OBD-II Trouble Code: Passenger Side Side-Mount Air Bag Circuit Short to Vbatt
B1996 trouble code means there's a problem with the passenger side side-mount air bag circuit, caused by faulty wiring or connectors or the air bag.