Geely Diagnosis Flow. Manual part — 43

169

No.127 Weak with poor performance while accelerating

General malfunction part:1. fuel containing water; 2. intake pressure sensor and throttle valve
position sensor;3. spark plug;4. ignition coil; 5. throttle valve body and idling speed bypass air
duct; 6. intake duct;7、idling speed regulator; 8 oil injector; 9. ignition timing; 10. exhaust pipe.
General diagnosis flowchart:

Serial No.

Operation steps

Results

Follow-ups

Yes Repair

1

Check there are malfunctions such as clutch skidding, low tire
pressure, braking dragging, incorrect tire dimension, incorrect
positioning of four wheels, etc.

No Next

step

Yes

Repair air intake
system

2

Check air filter is blocked.

No Next

step

Yes Next

step

3

Connect fuel pressure gauge (access point is front end of oil sucker
of fuel distribution pipe assembly), and start the engine, and check
fuel pressure is around 350kPa during accelerating.

No

Repair oil supply
system

Yes Next

step

4

Take out line of one cylinder, and connect spark plug, making spark
plug electrode about 5mm away from engine body. Startup the
engine and check strength of high pressure spark is normal.

No Repair

ignition

system

Yes Next

step

5

Check spark plug of each cylinder, and observe its type and
clearance conform to the specifications.

No

Adjust or replace

Yes

Clean concerned parts

6

Remove idling speed regulator, and check throttle valve body, idling
speed regulator and idling speed bypass air duct are with carbon
deposit.

No Next

step

Yes Next

step

7

Check intake pressure sensor, throttle valve position sensor and its
lines are normal.

No

Repair lines or replace
sensor

Yes

Replace malfunction

8

Remove oil injector, and check it is leaking or blocked with special
cleaning and analysis instrument.

No Next

step

Yes Replace

fuel

9

Check fuel condition and observe malfunction is caused just after
refueling.

No Next

step

Yes Next

step

10

Check ignition sequence and ignition timing of the engine conform to
the specifications.

No Repair

ignition

timing

Yes Next

step

11

Check exhaust pipe is smoothly exhausted.

No

Repair or replace
exhaust pipe

Yes

Diagnosis help

12

Connect commutator of electric injection system, and open ignition
switch, and check power supply of 12#, 13#, 44#, 45#, ,63# pins
are normal; check bonding of 3#, 51#, 53#, 61#, 80# pins are
normal.

No

Repair corresponding
lines

170

No.128 Malfunction code with EOBD system

NO Malfunction

code

Description

Malfunction

level

1

P0030

Open-circuit of heating control circuit of upstream oxygen sensor

3

2

P0031

Short-circuit to earth of heating control circuit of upstream oxygen sensor

3

3 P0032

Short-circuit to power source of heating control circuit of upstream oxygen
sensor

3

4

P0036

Open-circuit of heating control circuit of downstream oxygen sensor

3

5

P0037

Short-circuit to earth of heating control circuit for downstream oxygen sensor

3

6 P0038

Short-circuit to power source of heating control circuit for downstream oxygen
sensor

3

7 P0053

Unreasonable heating internal resistance, upstream oxygen sensor

3

8

P0054

Unreasonable heating internal resistance, downstream oxygen sensor

3

9

P0105

Unchanged signal (icing) of intake pressure sensor

3

10

P0106

Intake pressure sensor unreasonable

3

11

P0107

Intake pressure sensor short circuit to earth

3

12

P0108

Intake pressure sensor short circuit to power source

3

13

P0112

Too low signal voltage of intake temperature sensor

3

14

P0113

Too high signal voltage of intake temperature sensor

3

15

P0116

Unreasonable temperature signal of engine coolant

3

16

P0117

Too low circuit voltage of temperature sensor of engine coolant

3

17

P0118

Too high circuit voltage of temperature sensor of engine coolant

3

18

P0122

Circuit voltage exceeding minimum value, throttle position sensor

3

19

P0123

Circuit voltage exceeding maximum value, throttle position sensor

3

20

P0130

Unreasonable signal upstream oxygen sensor

3

21

P0132

Circuit voltage too high, upstream oxygen sensor signal

3

22

P0133

Upstream oxygen sensor aging (signal slows down)

3

171

23

P0134

Circuit signal malfunction, upstream oxygen sensor

3

24

P0136

Unreasonable signal of downstream oxygen sensor

3

25

P0138

Circuit voltage too high, downstream oxygen sensor signal

3

26

P0140

Circuit signal malfunction, downstream oxygen sensor

3

27 P0170

Unreasonable self-learning of closed-loop control of air fuel ratio for off-line
test

7

28

P0171

Over-thin of self-learning of closed-loop control of air fuel ratio for off-line test

7

29

P0172

Lower cable inspection air/fuel ratio closed circuit self-adaptation too thick

7

30

P0201

Open circuit of 1st cylinder fuel injector controlling circuit

3

31

P0202

Open circuit of 2nd cylinder fuel injector controlling circuit

3

32

P0203

3rd cylinder fuel injector controlling circuit open circuit

3

33

P0204

Open circuit of 4th cylinder fuel injector controlling l circuit

3

34

P0261

Short circuit to earth of 1st cylinder fuel injector controlling circuit

3

35

P0262

Short circuit to power supply of 1st cylinder fuel injector controlling circuit

3

36

P0264

Short circuit to earth of 2nd cylinder fuel injector controlling circuit

3

37

P0265

Short circuit to power supply of 2nd cylinder fuel injector controlling t circuit

3

38

P0267

Short circuit to earth of 3rd cylinder fuel injector controlling circuit

3

39

P0268

Short circuit to power supply of 3rd cylinder fuel injector controlling circuit

3

40

P0270

Short circuit to earth of 4th cylinder fuel injector controlling circuit

3

41

P0271

Short circuit to power supply of 4th cylinder fuel injector controlling circuit

3

42

P0300

Several cylinders misfire

2

43

P0301

1st cylinder misfire

2

172

44

P0302

2nd cylinder misfire

2

45

P0303

3rd cylinder misfire

2

46

P0304

4th cylinder misfire

2

47

P0318

Damaged circuit inspection accelerating sensor signal failure

3

48

P0321

Crankshaft signal error

3

49

P0322

No engine speed sensor pulse signal (open or short circuit)

4

50

P0324

Knock signal processing chip and other circuit malfunction

6

51

P0327

Knock sensor signal circuit voltage lower than normal value

3

52

P0328

Knock sensor signal circuit voltage over normal value

3

53

P0340

Improper phase sensor mounting position

3

54

P0341

Poor phase sensor conduction

3

55

P0342

Phase sensor short circuit with earth

3

56

P0343

Phase sensor short circuit with power supply

3

57

P0420

3 way catalytic converter ageing (emission over standard level)

3

58

P0444

Canister valve controlling circuit open circuit

3

59

P0458

Canister valve controlling circuit voltage lower than normal value

3

60

P0459

Canister valve controlling circuit voltage over normal value

3

61

P0480

Cooling fan relay controlling circuit open circuit (low speed)

5

62

P0481

Cooling fan relay controlling circuit open circuit (high speed)

5

63

P0501

Vehicle speed sensor signal unreasonable

3