Skip the auto shop - Our mechanics make house calls

Q: At 60 mph tachometer fluctuates between 3000 and red line

asked by on

The tachometer begins to fluctuate when I am driving near 60 mph. It wavers when it is between 3000 and the red line. Sometimes it wants to stop when it is near the 60 mph speed. Within the past five years, the distributor, main relay, and the alternator have been replaced. This problem began after a replacement of the half-shafts. The same mechanic who replaced the half-shafts also replaced the timing belt. He also performed a complete electrical check. Sometimes I get a CEL and at times when going up steep hills. The codes are 1 and 20, electric load detector, and oxygen sensor. I was told that the electric load detector code might go away with the recent alternator replacement. My car is still having difficulties and would you please tell me what you think the problem is with my car?

A: Hello. The Electric Code Detector is a comp...

Hello. The Electric Code Detector is a component of the fuse block that detects increased electrical power needed and increases the idle speed to allow the alternator to provide more power. There is a specific test from Honda to determine if this component has failed. For a second opinion, a professional mechanic, like one from YourMechanic, can perform this test to determine if that function has failed. The mechanic should also check for additional problem codes since you mention the Check Engine light coming on intermittently.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Tachometer only goes up.

Hello and thanks for contacting YourMechanic. It seems that your tachometer is loosing voltage in the rheostat (the part that makes the meter work). The tachometer gets its signal from the computer or the ignition coil pack ground circuit. If...

Q: Fuel tank door not opening

The fuel door on this van also has a safety switch inside the door that will disable the automatic side door if the fuel door is open. The fuel door has to be opened in order to see if it...

Q: Which type of wiring kit do I need to buy to rewire the interior fuse box?

I don't know what the resale value is of your car, but I tend to believe the mechanic that advised you is correct. Keep in mind you are about to undertake a complicated project that only the most experienced among...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...