DTC P2066: Fuel Level Sensor (sub) Circuit Range/Performance

TECHNICAL DESCRIPTION

The fuel level sensor converts the rest of the fuel to a voltage and sends it to the combination meter.
The combination meter sends the data regarding the rest of the fuel to the ECM.
The ECM checks whether this data is within a specified range.

DESCRIPTIONS OF MONITOR METHODS

Detect malfunction if change of fuel level sensor output voltage is small when sum of fuel injection is large.

MONITOR EXECUTION

MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)

Not applicable

Sensor (The sensor below is determined to be normal)

Not applicable

DTC SET CONDITIONS

Logic Flow Chart

Check Condition, Judgement Criterion

When the fuel consumption calculated from the operation time of the injector amounts to 30 litters (7.9 gal), the diversity of the amount of fuel in tank calculated from the fuel level sensor is 2 litters (0.5 gal) or less.

FAIL-SAFE AND BACKUP FUNCTION

None

OBD-II DRIVE CYCLE PATTERN

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)

Fuel pump module or fuel level sensor (sub) failed.
ECM failed.

DIAGNOSIS

Required Special Tools:

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: V.C.I.
MB991827: USB Cable
MB991910: Main Harness A

STEP 1. Using scan tool MB991958, read the diagnostic trouble code (DTC).

caution

To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

(1)Connect scan tool MB991958 to the data link connector.
(2)Turn the ignition switch to the "ON" position.
(3)Read the DTC.
(4)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is DTC P0461 set?

Go to Step 2.

Go to Step 4.

STEP 2. Check fuel gauge.

Q. Is the fuel gauge functioning?

	Go to Step 3.

	Refer to GROUP 54A, Combination Meter - Trouble Symptom Chart .

STEP 3. Check the trouble symptoms.

Q. Does the fuel gauge operates correctly?

	It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .

	Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP 42B, Diagnosis - ID Code Registration Necessity Judgment Table <Vehicles with KOS> or GROUP 42C, Diagnosis - ID Codes Registration Judgment Table <Vehicles with WCM> . Then go to Step 6.

STEP 4. Check the fuel level sensor (sub).

Check to see if the fuel level sensor is normal. Refer to GROUP 54A, Combination Meter - On-vehicle Service - Fuel Level Sensor Check

Q. Is the fuel level sensor (sub) normal?

	Go to Step 5.

	Replace the fuel level sensor (sub). Then go to Step 6.

STEP 5. Check the trouble symptoms.

Q. Does the fuel gauge operates correctly?

	It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .

	Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP 42B, Diagnosis - ID Code Registration Necessity Judgment Table <Vehicles with KOS> or GROUP 42C, Diagnosis - ID Codes Registration Judgment Table <Vehicles with WCM> . Then go to Step 6.

STEP 6. Check the trouble symptoms.

Q. Does the fuel gauge operates correctly?

	The inspection is complete.

	Retry the troubleshooting.