Ignition and Knock Sensor DTC Codes

Ignition system, knock sensor, spark control OBD-II codes — and why these should never be suppressed.

161 codes in this system Do NOT suppress

About Ignition / Knock codes

Knock and ignition codes are engine-protective. If you're seeing knock DTCs after a tune, the tune is too aggressive — back off. Suppressing knock detection is a fast way to bend rods or melt pistons.

All 161 codes in Ignition / Knock

P030A

Ignition A Control Signal Circuit/Open

P030B

Ignition A Control Signal Circuit Low

P030C

Ignition A Control Signal Circuit High

P030D

Ignition B Control Signal Circuit/Open

P030E

Ignition B Control Signal Circuit Low

P030F

Ignition B Control Signal Circuit High

P031A

Ignition C Control Signal Circuit/Open

P031B

Ignition C Control Signal Circuit Low

P031C

Ignition C Control Signal Circuit High

P031D

Ignition D Control Signal Circuit/Open

P031E

Ignition D Control Signal Circuit Low

P031F

Ignition D Control Signal Circuit High

P0320

Ignition/Distributor Engine Speed Input Circuit Malfunction

P0321

Ignition/Distributor Engine Speed Input Circuit Range/Performance

P0322

Ignition/Distributor Engine Speed Input Circuit No Signal

P0323

Ignition/Distributor Engine Speed Input Circuit Intermittent

P0324

Knock Control System Error

P0325

Knock Sensor 1 Circuit Malfunction (Bank I or Single Sensor)

P0326

Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)

P0327

Knock Sensor 1 Circuit Low Input (Bank I or Single Sensor)

P0328

Knock Sensor 1 Circuit High Input (Bank I or Single Sensor)

P0329

Knock Sensor 1 Circuit Intermittent (Bank 1 or Single Sensor)

P032A

Knock/Combustion Vibration Sensor C Circuit

P032B

Knock/Combustion Vibration Sensor C Circuit Range/Performance

P032C

Knock/Combustion Vibration Sensor C Circuit Low

P032D

Knock/Combustion Vibration Sensor C Circuit High

P032E

Knock/Combustion Vibration Sensor C Circuit Intermittent

P0330

Knock Sensor 2 Circuit Malfunction (Bank 2)

P0331

Knock Sensor 2 Circuit Range/Performance (Bank 2)

P0332

Knock Sensor 2 Circuit Low Input (Bank 2)

P0333

Knock Sensor 2 Circuit High Input (Bank 2)

P0334

Knock Sensor 2 Circuit Intermittent (Bank 2)

P033A

Knock/Combustion Vibration Sensor D Circuit

P033B

Knock/Combustion Vibration Sensor D Circuit Range/Performance

P033C

Knock/Combustion Vibration Sensor D Circuit Low

P033D

Knock/Combustion Vibration Sensor D Circuit High

P033E

Knock/Combustion Vibration Sensor D Circuit Intermittent

P0350

Ignition Coil Primary/Secondary Circuit Malfunction

P0351

Ignition Coil A Primary Control Circuit/Open

P0352

Ignition Coil B Primary Control Circuit/Open

P0353

Ignition Coil C Primary Control Circuit/Open

P0354

Ignition Coil D Primary Control Circuit/Open

P0355

Ignition Coil E Primary Control Circuit/Open

P0356

Ignition Coil F Primary Control Circuit/Open

P0357

Ignition Coil G Primary Control Circuit/Open

P0358

Ignition Coil H Primary Control Circuit/Open

P0359

Ignition Coil I Primary Control Circuit/Open

P035A

Ignition E Control Signal Circuit/Open

P035B

Ignition E Control Signal Circuit Low

P035C

Ignition E Control Signal Circuit High

P035D

Ignition F Control Signal Circuit/Open

P035E

Ignition F Control Signal Circuit Low

P035F

Ignition F Control Signal Circuit High

P0360

Ignition Coil J Primary Control Circuit/Open

P0361

Ignition Coil K Primary Control Circuit/Open

P0362

Ignition Coil L Primary Control Circuit/Open

P036A

Ignition G Control Signal Circuit/Open

P036B

Ignition G Control Signal Circuit Low

P036C

Ignition G Control Signal Circuit High

P036D

Ignition H Control Signal Circuit/Open

P036E

Ignition H Control Signal Circuit Low

P036F

Ignition H Control Signal Circuit High

P038A

Ignition I Control Signal Circuit/Open

P038B

Ignition I Control Signal Circuit Low

P038C

Ignition I Control Signal Circuit High

P038D

Ignition J Control Signal Circuit/Open

P038E

Ignition J Control Signal Circuit Low

P038F

Ignition J Control Signal Circuit High

P03FA

Ignition K Control Signal Circuit/Open

P03FB

Ignition K Control Signal Circuit Low

P03FC

Ignition K Control Signal Circuit High

P03FD

Ignition L Control Signal Circuit/Open

P03FE

Ignition L Control Signal Circuit Low

P03FF

Ignition L Control Signal Circuit High

P050B

Cold Start Ignition Timing Performance

P06B6

Internal Control Module Knock/Combustion Vibration Sensor Processor 1 Performance

P06B7

Internal Control Module Knock/Combustion Vibration Sensor Processor 2 Performance

P06D1

Internal Control Module Ignition Coil Control Performance

P2300

Ignition Coil A Pri Ctrl Circ Low

P2301

Ignition Coil A Pri Ctrl Circ High

P2302

Ignition Coil A Sec Circ

P2303

Ignition Coil B Pri Ctrl Circ Low

P2304

Ignition Coil B Pri Ctrl Circ High

P2305

Ignition Coil B Sec Circ

P2306

Ignition Coil C Pri Ctrl Circ Low

P2307

Ignition Coil C Pri Ctrl Circ High

P2308

Ignition Coil C Sec Circ

P2309

Ignition Coil D Pri Ctrl Circ Low

P2310

Ignition Coil D Pri Ctrl Circ High

P2311

Ignition Coil D Sec Circ

P2312

Ignition Coil E Pri Ctrl Circ Low

P2313

Ignition Coil E Pri Ctrl Circ High

P2314

Ignition Coil E Sec Circ

P2315

Ignition Coil F Pri Ctrl Circ Low

P2316

Ignition Coil F Pri Ctrl Circ High

P2317

Ignition Coil F Sec Circ

P2318

Ignition Coil G Pri Ctrl Circ Low

P2319

Ignition Coil G Pri Ctrl Circ High

P2320

Ignition Coil G Sec Circ

P2321

Ignition Coil H Pri Ctrl Circ Low

P2322

Ignition Coil H Pri Ctrl Circ High

P2323

Ignition Coil H Sec Circ

P2324

Ignition Coil I Pri Ctrl Circ Low

P2325

Ignition Coil I Pri Ctrl Circ High

P2326

Ignition Coil I Sec Circ

P2327

Ignition Coil J Pri Ctrl Circ Low

P2328

Ignition Coil J Pri Ctrl Circ High

P2329

Ignition Coil J Sec Circ

P2330

Ignition Coil K Pri Ctrl Circ Low

P2331

Ignition Coil K Pri Ctrl Circ High

P2332

Ignition Coil K Sec Circ

P2333

Ignition Coil L Pri Ctrl Circ Low

P2334

Ignition Coil L Pri Ctrl Circ High

P2335

Ignition Coil L Sec Circ

P2336

Cylinder #1 Above Knock Threshold

P2337

Cylinder #2 Above Knock Threshold

P2338

Cylinder #3 Above Knock Threshold

P2339

Cylinder #4 Above Knock Threshold

P2340

Cylinder #5 Above Knock Threshold

P2341

Cylinder #6 Above Knock Threshold

P2342

Cylinder #7 Above Knock Threshold

P2343

Cylinder #8 Above Knock Threshold

P2344

Cylinder #9 Above Knock Threshold

P2345

Cylinder #10 Above Knock Threshold

P2346

Cylinder #11 Above Knock Threshold

P2347

Cylinder #12 Above Knock Threshold

P2530

Ignition Switch Run Pos Circ

P2531

Ignition Switch Run Pos Circ Low

P2532

Ignition Switch Run Pos Circ High

P2533

Ignition Switch Run/Start Pos Circ

P2534

Ignition Switch Run/Start Pos Circ Low

P2535

Ignition Switch Run/Start Pos Circ High

P2536

Ignition Switch Accessory Pos Circ

P2537

Ignition Switch Accessory Pos Circ Low

P2538

Ignition Switch Accessory Pos Circ High

P25B7

Auxiliary Ignition Switch On/Start Position Circuit

P25B8

Auxiliary Ignition Switch On/Start Position Circuit Low

P25B9

Auxiliary Ignition Switch On/Start Position Circuit High

P2C30

Ignition Coil Primary Circuit Fuse A

P2C31

Ignition Coil Primary Circuit Fuse B

P2D0F

Engine Pre-Ignition Above Threshold

P2D10

Engine Pre-Ignition Above Threshold - Forced Limited Power

U300A

Ignition Switch

U300B

Ignition Input Accessory/On/Start

U300C

Ignition Input Off/On/Start

U300D

Ignition Input On/Start

U300E

Ignition Input On

U300F

Ignition Input Accessory

U3010

Ignition Input Start

U3011

Ignition Input Off

U3022

Ignition Input Accessory/Off

U3023

Control Module Input Power Circuit A - Ignition Input On/Start Circuit Correlation

U3024

Control Module Input Power Circuit B - Ignition Input On/Start Circuit Correlation

U302B

Ignition Output Accessory/On/Start

U302C

Ignition Output Off/On/Start

U302D

Ignition Output On/Start

U302E

Ignition Output On

U302F

Ignition Output Accessory

U3030

Ignition Output Start

U3031

Ignition Output Off

U3032

Ignition Output Accessory/Off

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