Denso system fault code table

by MOU YONG HONG on December 01, 2021

With the increase in the popularity of cars, the denso system has also entered our lives. But many customers are unable to start because they don't understand simple fault codes. When the fault code is displayed on the dashboard, it is not known whether there is a problem with a certain component or the entire system. Finally, most people will choose to hire a professional maintenance master to handle all problems. Without professional tools, it will take a lot of time to troubleshoot problems. Sometimes, the maintenance master will not be able to find the problem without relevant experience. In this way, a lot of our time and financial resources are wasted. Therefore, it is very important for you to understand the meaning of these fault codes. Especially for some minor faults, you don’t need to go to the repair shop, and you can troubleshoot them according to the prompts.

Serial number Fault Code Description
1 P0016 The relative position of camshaft and crankshaft is not reasonable
2 P0030 The upstream oxygen sensor heating control circuit is open
3 P0031 The upstream oxygen sensor heating control circuit is shorted to ground
4 P0032 The upstream oxygen sensor heating control circuit is shorted to the power supply
5 P0036 The downstream oxygen sensor heating control circuit is open
6 P0037 The downstream oxygen sensor heating control circuit is shorted to ground
7 P0038 The downstream oxygen sensor heating control circuit is shorted to the power supply
8 P0053 The upstream oxygen sensor heating internal resistance is unreasonable
9 P0054 The downstream oxygen sensor heating internal resistance is unreasonable
10 P0105 No change in intake pressure sensor signal (icing)
11 P0106 The intake pressure sensor is unreasonable
12 P0107 Intake pressure sensor is shorted to ground
13 P0108 The intake air pressure sensor is shorted to the power supply
14 P0112 Intake air temperature sensor signal voltage is too low
15 P0113 Intake air temperature sensor signal voltage is too high
16 P0116 Engine coolant temperature sensor is unreasonable
17 P0117 Engine cooling night temperature sensor circuit voltage is too low
18 P0118 Engine coolant temperature sensor circuit voltage is too high
19 P0120 Throttle position sensor signal is unreasonable
20 P0122 Throttle position sensor circuit voltage ultra-low limit
21 P0123 Throttle position sensor circuit voltage limit
22 P0130 The upstream oxygen sensor signal is unreasonable
23 P0131 The signal voltage of the upstream oxygen sensor is too low
24 P0132 The upstream oxygen sensor signal circuit voltage is too high
25 P0133 Upstream oxygen sensor aging
26 P0134 Upstream oxygen sensor circuit signal failure
27 P0135 Upstream oxygen sensor heating circuit failure
28 P0136 The downstream oxygen sensor signal is unreasonable
29 P0137 Downstream oxygen sensor signal voltage is too low
30 P0138 Downstream oxygen sensor signal circuit voltage is too high
31 P0140 Downstream oxygen sensor circuit signal failure
32 P0170/ Offline detection of air-fuel ratio closed-loop control self-learning is unreasonable
33 P0171 Offline detection of air-fuel ratio closed-loop control self-learning is too lean
34 P0172 Offline detection air-fuel ratio closed-loop control self-learning is too rich
35 P0201 One-cylinder injector control circuit is open
36 P0202 Two-cylinder injector control circuit is open
37 |P0203 Three-cylinder injector control circuit is open
38 P0204 Four-cylinder injector control circuit is open
39 P0230 Oil pump control circuit failure
40 P0261 One-cylinder injector control circuit is shorted to ground
41 P0262 A cylinder injector control circuit is shorted to the power supply
42 P0264 Two-cylinder injector control circuit is shorted to ground
43 P0265 Two-cylinder injector control circuit 7 short circuit
44 P0267 Three-cylinder injector control circuit is shorted to ground
45 P0268 The three-cylinder injector control circuit is shorted to the power supply
46 P0270 Four-cylinder injector control circuit is shorted to ground
47 P0271 The four-cylinder injector control circuit is shorted to the power supply
48 P0300 Multi-cylinder misfire occurs
49 P0301 A cylinder misfire occurred
50 P0302 The second cylinder misfire occurred
51 P0303 Three-cylinder misfire occurred
52 P0304 Four cylinder misfire occurred
53 P0317 Bad road detection ABS signal failure
54 P0318 Bad road detection acceleration sensor signal failure
55 P0321 Frequent loss of EM signal for DG to the speed signal
56 P0322 No speed sensor pulse signal (open circuit or short circuit)
57 P0324 Knock signal processing chip and its circuit failure
58 P0325 Knock sensor circuit failure
59 P0327 The voltage of the knock sensor signal circuit is too low
60 P0328 The voltage of the knock sensor signal circuit is too high
61 P0335 Crankshaft position sensor circuit voltage failure
62 P0336 Crankshaft position sensor signal is unreasonable
63 P0340 Improper installation position of phase sensor
64 P0341 Poor contact of phase sensor
65 P0342 Phase sensor is shorted to ground
66 P0343 The phase sensor is shorted to the power supply
67 P0420 The oxygen storage capacity of the three-way catalytic converter is aging (exceeding emission limit)
68 P0443 Canister control valve control circuit signal is unreasonable
69 P0444 Canister control valve control circuit is open
70 P0445 Canister control valve control circuit voltage limit
71 P0458 Canister control circuit voltage is too low
72 P0459 Canister control valve control circuit voltage is too high
73 P0480 Cooling fan relay control circuit is open (low speed)
74 P0481 Open circuit of cooling fan and electrical control circuit (high speed)
75 |P0500 Vehicle speed sensor failure
76 P0501 Unreasonable signal of vehicle speed sensor
77 P0506 Idle speed control speed is lower than target idle speed
78 P0507 Idle speed control speed is higher than target idle speed
79 P0508 Stepper motor drive pin is shorted to ground
80 P0509 The stepper motor drive pin is shorted to the power supply
81 P0511 Stepper motor drive pin is open
82 P0532 Air conditioner evaporator pressure sensor voltage is too high
83 P0533 Air conditioner evaporator pressure sensor voltage is too low
84 P0537 Air conditioner evaporator temperature sensor short circuit to ground
85 P0538 The air conditioner evaporator temperature sensor is shorted to the power supply
86 P0560 The system battery voltage signal is unreasonable
87 P0562 System battery voltage is too low
88 P0563 System battery voltage is too high
89 P0602 Electronic control unit coding failure
90 P0627 Open circuit of oil pump and electrical control circuit
91 P0628 Oil pump relay control circuit is shorted to ground
92 P0629 The oil pump relay control circuit is shorted to the power supply
93 P0645 A/C compressor relay control circuit is open
94 P0646 A/C compressor wei electrical appliance control circuit is shorted to ground
95 P0647 A/C compressor dimensional electrical control circuit is shorted to the power supply
96 P0650 MIL lamp driver stage circuit is shorted to the source
97 P0691 The cooling fan relay control circuit is shorted to ground (low speed)
98 P0692 The cooling fan relay control circuit is shorted to the power supply (low speed)
99 P0693 The cooling fan's control circuit of the electrical appliance is short-circuited to ground (high speed)
100 P0694 The cooling fan's electrical control circuit is shorted to the power supply (high speed)
101 P0700 External request lighting failure
102 P1610 Anti-theft key has no code
103 P1611 The key's anti-theft code is wrong
104 P1612 The anti-theft device and ECU communication is broken
105 P1613 The anti-theft device and ECU communication is broken
106 P1614 Chip failure in anti-theft key
107 P1651 SVS lamp driver stage circuit failure
108 P2177 Air-fuel ratio closed-loop control self-learning value exceeds the upper limit (medium load zone)
109 P2178 Air-fuel ratio closed-loop control self-learning value exceeds the lower limit (medium load zone)
110 P2187 The air-fuel ratio closed-loop control self-learning value exceeds the upper limit (low load area)
111 P2188 Air-fuel ratio closed-loop control self-learning value exceeds the lower limit (low load area)
112 P2195 Upstream oxygen sensor aging
113 P2196 Upstream oxygen sensor aging
114 P2270 Downstream oxygen sensor aging
115 P2271 Downstream oxygen sensor aging
116 U0001 CAN communication related diagnosis
117 U0101 ECU and TCU control module communication
118 U0104 ECU communicates with cruise control module
119 U0155 ECU communicates with dashboard control module
120 U0415 ECU and ABS-ECU control module communication
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