Acura RSX Honda Integra. Manual — part 114

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DTC P0171:

DTC P0172:

YES

NO

YES

NO

11-162

PGM-FI System

DTC Troubleshooting (cont’d)

Fuel System Too Lean

(2005-2006 models)

Fuel System Too Rich

(2005-2006 models)

NOTE: If some of the DTCs listed below are stored at
the same time as DTC P0171 and/or P0172,
troubleshoot those DTCs first, then recheck for P0171
and/or P0172.

P0107, P0108, P1128, P1129: Manifold absolute
pressure (MAP) sensor
P0133, P1157, P2195, P2238, P2252, P2A00: Air fuel ratio
(A/F) sensor (Sensor 1)
P0134, P0135: Air fuel ratio (A/F) sensor (Sensor 1)
heater
P0137, P0138, P0139: Secondary HO2S (Sensor 2)
P0141: Secondary HO2S (Sensor 2) heater
P2646, P2647, P2648, P2649: VTEC system
P2279: Intake air leakage

1. Check the fuel pressure (see page 11-363).

Check the engine valve clearances and adjust

if necessary. If the valve clearances are OK, replace
the injectors (see page 11-277), then go to step 2.

Check the fuel pressure (see page 11-363).

• If the pressure is too high, replace the fuel

pressure regulator (see page 11-373), then go to
step 2.

• If the pressure is too low, check the fuel pump

and the fuel feed line, then go to step 2.

2. Turn the ignition switch ON (II).

3. Reset the ECM/PCM with the HDS.

4. Do the ECM/PCM idle learn procedure (see page

11-349).

5. Start the engine. Hold the engine speed at

3,000 rpm without load (in Park or neutral) until the
radiator fan comes on, then let it idle.

6. Test-drive under these conditions:

• Engine coolant temperature above 158 °F (70 °C)
• A/T in D position (M/T in 5th gear)
• Drive at a steady speed between 15

75 mph

(24

120 km/h)

NOTE: DTC P0171, P0172, P0174, and/or P0175 may
take up to 80 minutes of test driving to set. Using
the HDS, monitor the air fuel feed back average (AF
FB AVE). If the long term fuel trim/air fuel feed back
average stays within 0.81

1.17, there is no

problem at this time.

7. Check for Temporary DTCs or DTCs with the HDS.

If DTC P0171 or P0172 is indicated, go to

step 1. If any other Temporary DTCs or DTCs are
indicated, go to the indicated DTC’s
troubleshooting.

Troubleshooting is complete.

Is the f uel pr essur e OK ?

Ar e any T empor ar y DT Cs or DT Cs indicated?

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DTC P0300:

DTC P0301:

DTC P0302:

DTC P0303:

DTC P0304:

Symptom

Procedure(s)

Also check for:

11-163

Random Misfire and Some Combination of the Following:

(2002-2004 models)

No. 1 Cylinder Misfire Detected

(2002-2004 models)

No. 2 Cylinder Misfire Detected

(2002-2004 models)

No. 3 Cylinder Misfire Detected

(2002-2004 models)

No. 4 Cylinder Misfire Detected

(2002-2004 models)

NOTE:

• If the misfiring is frequent enough to trigger detection of increased emissions during two consecutive driving cycles,

the MIL will come on, and DTC P0300 (and some combination of P0301 through P0304) will be stored.

• If the misfiring is frequent enough to damage the catalyst, the MIL will blink whenever the misfiring occurs, and DTC

P0300 (and some combination of P0301 through P0304) will be stored. When the misfiring stops, the MIL will remain
on.

1. Troubleshoot the following DTCs first if any of them were stored along with the random misfire DTC(s):

P0107, P0108, P1128, P1129: Manifold absolute pressure (MAP) sensor
P0171, P0172: Fuel system
P0335, P0336 (P0339) : Crankshaft position (CKP) sensor
P0505 (P0506, P0507) : Idle control system
P1259 (P2646, P2647) : VTEC system
P1361, P1362 (P0365, P0369) : Camshaft position (CMP) sensor B
P1519 (P0511) : Idle air control (IAC) valve

: 2004 model

2. Test-drive the vehicle to verify the symptom.

3. Find the symptom in the chart below, and do the related procedures and checks, in the order listed, until you find

the cause.

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Random misfire only
at low RPM and
under load

Check fuel pressure (see page 11-363).

Low compression.
Low quality fuel.

Random misfire only
during acceleration

Check fuel pressure (see page 11-363).

Malfunction in the VTEC
system (see page 6-7).

Random misfire at
high RPM, under
load, or under
random conditions

Check fuel pressure (see page 11-363).

Correct valve clearance
(see page 6-11).

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DTC P0300:

DTC P0301:

DTC P0302:

DTC P0303:

DTC P0304:

Special Tools Required

YES

NO

YES

NO

YES

NO

11-164

PGM-FI System

DTC Troubleshooting (cont’d)

Random Misfire and Some

Combination of the Following:
(2005-2006 models)

No. 1 Cylinder Misfire Detected

(2005-2006 models)

No. 2 Cylinder Misfire Detected

(2005-2006 models)

No. 3 Cylinder Misfire Detected

(2005-2006 models)

No. 4 Cylinder Misfire Detected

(2005-2006 models)

• Pressure gauge adaptor 07NAJ-P07010A
• A/T low pressure gauge w/panel 07406-0070300
• A/T pressure hose 07406-0020201
• A/T pressure hose, 2,210 mm 07MAJ-PY4011A
• A/T pressure hose, adapter 07MAJ-PY40120
• Oil pressure hose 07ZAJ-S5A0200

NOTE:

• If the misfire is frequent enough to trigger detection

of increased emissions during 2 consecutive driving
cycles, the MIL will come on, and DTC P0300 (and
some combination of P0301 through P0304) will be
stored.

• If the misfire is frequent enough to damage the

catalyst, the MIL will flash whenever the misfire
occurs, and DTC P0300 (and some combination of
P0301 through P0304) will be stored. When the
misfire stops, the MIL will remain on.

• Troubleshoot the following DTCs first, if any of them

were stored along with the random misfire DTC(s):

P0107, P0108, P1128, P1129: Manifold absolute
pressure (MAP) sensor
P0171, P0172: Fuel system
P0335, P0339: Crankshaft position (CKP) sensor
P0365, P0369: Camshaft position (CMP) sensor B
P0506, P0507: Idle control system

1. Record all freeze data and on-board snapshots with

the HDS.

2. Clear the DTC with the HDS.

3. Start the engine (in Park or neutral), then let it idle

without load.

4. Monitor the OBD STATUS for DTC P0301, P0302,

P0303, or P0304 in the DTCs MENU with the HDS.

Go to step 9.

If the screen indicates PASSED, go to step 5. If

the screen indicates EXECUTING, keep driving until
a result comes on. If the screen indicates OUT OF
CONDITION, wait for several minutes, and recheck.

5. Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3

MISFIRE, and/or CYL4 MISFIRE in the DATA LIST
for 10 minutes with the HDS.

Go to step 9.

Go to step 6.

6. Test-drive the vehicle for several minutes in the

range of these recorded freeze data parameters:

• Engine speed
• Vehicle speed
• Throttle position
• CLV (calculated load value)
• Gear position

7. Monitor the OBD STATUS for DTC P0301, P0302,

P0303, or P0304 in the DTCs MENU with the HDS.

Go to step 9.

If the screen indicates PASSED, go to step 8. If

the screen indicates EXECUTING, keep driving until
a result comes on. If the screen indicates OUT OF
CONDITION, go to step 6 and recheck.

Does the scr een indicate F AILED?

Does CY L1 MISF IRE, CY L2 MISF IRE, CY L3
MISF IRE, and/ or CY L4 MISF IRE show misf ir e
counts?

Does the scr een indicate F AILED?

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YES

NO

YES

NO

YES

NO

YES

NO

11-165

07406-0020201 or
07MAJ-PY4011A and
07MAJ-PY40120

A
22 N·m
(2.2 kgf·m,
16 lbf·ft)

07406-0070300

B
07NAJ-P07010A

07ZAJ-S5A0200

8. Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3

MISFIRE, and/or CYL4 MISFIRE in the DATA LIST
for 10 minutes with the HDS.

Go to step 9.

Intermittent failure, system is OK at this

time.

9. Turn the ignition switch OFF.

10. Check the fuel quality.

Go to step 11.

Drain the tank and fill it with known-good fuel,

then go to step 20.

11. Inspect the spark plugs (see page 4-28). If the spark

plugs are fouled or worn, replace them.

12. Test-drive the vehicle for several minutes in the

range of these recorded freeze data parameters:

• Engine speed
• Vehicle speed
• Throttle position
• CLV (calculated load value)
• Gear position

13. Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3

MISFIRE, and/or CYL4 MISFIRE in the DATA LIST
for 10 minutes with the HDS.

Go to step 14.

Go to step 20.

14. Check the fuel pressure (see page 11-363).

Go to step 15.

• If the pressure is too high,

replace the fuel pressure regulator (see page
11-373), then go to step 20.

• If the pressure is too low, check the fuel pump,

the fuel feed pipe, and the fuel filter. If they are
OK, replace the fuel pressure regulator (see page
11-373), then go to step 20.

15. Turn the ignition switch OFF.

16. Remove the rocker arm oil pressure switch (VTEC

oil pressure switch) (A), and install the special tools
as shown, then install the rocker arm oil pressure
switch (VTEC oil pressure switch) (A) in the
pressure gauge adapter (B).

NOTE: Install the switch in the reverse order of
removal with a new O-ring.

17. Reconnect the rocker arm oil pressure switch

(VTEC oil pressure switch) 2P connector.

18. Start the engine. Hold the engine speed at

3,000 rpm without load (in Park or neutral) until the
radiator fan comes on.

(cont’d)

Does CY L1 MISF IRE, CY L2 MISF IRE, CY L3
MISF IRE, and/ or CY L4 MISF IRE show misf ir e
counts?

Is the quality good?

Does CY L1 MISF IRE, CY L2 MISF IRE, CY L3
MISF IRE, and/ or CY L4 MISF IRE show misf ir e
counts?

Is the f uel pr essur e OK ?

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