Q: I have a 2000 honda civic EX and check engine light with D4 blinking ... and pulled the codes p1705 and p1768 ...

asked by on May 11, 2017

I have a 2000 honda civic EX and check engine light with D4 blinking ... and pulled the codes p1705 and p1768 ... most likely what would i replace first ..
My car has an automatic transmission.

Trouble code P1705 implicates the throttle position sensor (TPS). A transmission fault (which is indicated by a flashing "D4") can arise if the TPS is malfunctioning. Consequently, I would recommend testing the TPS first. Once code P1705 is resolved, then code P1768 comes into play. P1768 implicates the clutch pressure control solenoid valve circuit. You want to check for a faulty solenoid, a solenoid valve harness that is open or shorted, or a poor electrical connection (high resistance, voltage drop). The testing of both of these components can be accomplishing using the Factory Service Manual "decision tree" and, as well, a scanner (or scope) is useful for TPS testing. During one mobile visit by a certified mechanic, both codes can be diagnosed if you request a check engine light diagnostic. Replacement of parts without a conclusive diagnostic is not recommended as it is usually a waste of your repair dollars. The cardinal rule is, prior to doing anything, be sure that you have confirmed the failure. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
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

Get a quote

What others are asking

Oil light flickers.

Your engine knock may be due to worn rod or crank bearings. You should have the oil pressure checked to see if it is within specifications. With over 220k miles you may need to have the bearings and/or the oil...

How do I adjust the outside temperature display?

If you notice that your vehicle’s outside temperature display is off by a few degrees, you can adjust it to a few different settings: roughly 5 degrees colder, or roughly 5 degrees warmer. To adjust the outside temperature display to...

Transmission shift solenoids

Hi there, thanks for writing in. Your particular car is very prone to complete transmission failure, so I would not personally attempt to make repairs to the transmission, as it likely won't fix the problem, or may act simply as...

Related articles

P0193 OBD-II Trouble Code: Fuel Rail Pressure Sensor Circuit High Input
P0193 OBD-II Trouble Code: Fuel Rail Pressure Sensor Circuit High Input Diagnostic Trouble Code (DTC): P0193 P0193 trouble code definition Fuel rail...
P2020 OBD-II Trouble Code: Intake Manifold Runner Pos Sensor/Switch Circuit Range/Performance Bank 2
P2020 P2020 Code Definition A P2020 code is a generic powertrain code related to the fuel and air metering and auxiliary emissions control systems. The Intake Manifold Runner Control (IMRC) controls are utilized to change or control airflow in the...
P0857 OBD-II Trouble Code: Traction Control Input Signal Range/Performance
P0857 means that there is a malfunction found in the vehicle's traction control input signal circuit due to a faulty traction control switch.