Code
P020B
Generic
P — Powertrain
Cylinder 2 Injection Timing
Views:
UK: 15
EN: 32
RU: 16
AI status
Completed
Completed
100%
Causes
- Open or short in injector 2 wiring or connector
- Faulty injector (stuck, leaking, slow to respond)
- Defective injector driver in the PCM/ECM
- Low or fluctuating fuel rail pressure
- Incorrect camshaft/crankshaft timing or timing chain/belt wear
- Poor ground or supply voltage to injector circuit
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Rough idle or misfire felt at idle and load
- Reduced engine power and acceleration
- Poor fuel economy and increased emissions
- Hard starting or long cranking
- Possible engine vibration localized to cylinder 2
What to check
- Read and record freeze frame and full scan-tool data for P020B and related codes
- Compare injector timing/pulse width and current for cylinder 2 vs other cylinders using live data
- Inspect injector 2 connector and wiring for damage, corrosion, or loose pins
- Measure supply voltage and ground at the injector connector with key on/engine off and while cranking
- Measure injector resistance (ohms) and compare to manufacturer spec
- Use an oscilloscope or noid light to verify injector drive pulse shape, timing and duty cycle
Signal parameters
- Injector pulse width: typical gasoline range 1–10 ms (depends on load); diesel injector timing given in degrees BTDC — check OEM values
- Injector coil resistance: typical low-impedance injectors ~1–3 Ω, high-impedance ~12–16 Ω (specify OEM value)
- Injector drive voltage: near battery voltage (~11–14 V) on supply side; driver switches to ground on control side
- Injector current: varies by design — up to several amps for solenoid type; use current probe/scan tool
- Fuel rail pressure: gasoline port-injection ~30–60 psi (2–4 bar) for return systems; common-rail diesel much higher (hundreds to thousands psi) — compare to vehicle spec
- Crank/Cam sensor signals: square wave/VR patterns — must be present and synchronized with injection events
Diagnostic algorithm
- Verify DTC and capture freeze-frame data; clear code and perform a test drive to confirm reappearance
- Visual inspection: check wiring harness, connector pins, and injector for physical damage or contamination
- Check power and ground at injector 2 connector with a DMM; verify battery voltage on supply terminal and good ground path
- Measure injector coil resistance and compare to spec; if open or shorted, replace injector
- Use a noid light or oscilloscope at the injector connector to confirm proper pulse presence, timing and waveform while cranking/running
- Compare injector pulse width/current for cylinder 2 against a known-good cylinder; swap injectors between cylinders (2 and another) and re-scan to see if the fault follows the injector
- Check fuel rail pressure under static and dynamic conditions; repair fuel pump/regulator if pressure out of range
- If timing-controlled injection, verify cam/crank timing and sensor signals — repair timing components or sensors as needed
- If wiring and injector bench tests pass but issue remains, test or substitute the PCM/ECM or injector driver module per OEM procedures
- After repairs, clear codes and perform road test; re-check for stored codes and monitor live injector timing data
Likely causes
- Damaged/chafed harness to cylinder 2 injector
- Injector 2 internal failure (electrical or mechanical)
- Weak or missing injector supply voltage/ground
- Fuel pressure regulator or pump faults causing improper delivery
- PCM/ECM driver transistor failure
Fault status
Status
P020B — Cylinder 2 Injection Timing: PCM detected abnormal or missing injection timing/control for cylinder 2 indicating an injector circuit, timing, fuel delivery, or driver fault.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P020B
LAND ROVER
P — Powertrain
Cylinder 2 injection timing
Views:
UK: 4
EN: 15
RU: 5
AI status
Completed
Completed
100%
Causes
- Open or short in injector 2 wiring or connector
- Faulty injector (stuck, leaking, slow to respond)
- Defective injector driver in the PCM/ECM
- Low or fluctuating fuel rail pressure
- Incorrect camshaft/crankshaft timing or timing chain/belt wear
- Poor ground or supply voltage to injector circuit
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Rough idle or misfire felt at idle and load
- Reduced engine power and acceleration
- Poor fuel economy and increased emissions
- Hard starting or long cranking
- Possible engine vibration localized to cylinder 2
What to check
- Read and record freeze frame and full scan-tool data for P020B and related codes
- Compare injector timing/pulse width and current for cylinder 2 vs other cylinders using live data
- Inspect injector 2 connector and wiring for damage, corrosion, or loose pins
- Measure supply voltage and ground at the injector connector with key on/engine off and while cranking
- Measure injector resistance (ohms) and compare to manufacturer spec
- Use an oscilloscope or noid light to verify injector drive pulse shape, timing and duty cycle
Signal parameters
- Injector pulse width: typical gasoline range 1–10 ms (depends on load); diesel injector timing given in degrees BTDC — check OEM values
- Injector coil resistance: typical low-impedance injectors ~1–3 Ω, high-impedance ~12–16 Ω (specify OEM value)
- Injector drive voltage: near battery voltage (~11–14 V) on supply side; driver switches to ground on control side
- Injector current: varies by design — up to several amps for solenoid type; use current probe/scan tool
- Fuel rail pressure: gasoline port-injection ~30–60 psi (2–4 bar) for return systems; common-rail diesel much higher (hundreds to thousands psi) — compare to vehicle spec
- Crank/Cam sensor signals: square wave/VR patterns — must be present and synchronized with injection events
Diagnostic algorithm
- Verify DTC and capture freeze-frame data; clear code and perform a test drive to confirm reappearance
- Visual inspection: check wiring harness, connector pins, and injector for physical damage or contamination
- Check power and ground at injector 2 connector with a DMM; verify battery voltage on supply terminal and good ground path
- Measure injector coil resistance and compare to spec; if open or shorted, replace injector
- Use a noid light or oscilloscope at the injector connector to confirm proper pulse presence, timing and waveform while cranking/running
- Compare injector pulse width/current for cylinder 2 against a known-good cylinder; swap injectors between cylinders (2 and another) and re-scan to see if the fault follows the injector
- Check fuel rail pressure under static and dynamic conditions; repair fuel pump/regulator if pressure out of range
- If timing-controlled injection, verify cam/crank timing and sensor signals — repair timing components or sensors as needed
- If wiring and injector bench tests pass but issue remains, test or substitute the PCM/ECM or injector driver module per OEM procedures
- After repairs, clear codes and perform road test; re-check for stored codes and monitor live injector timing data
Likely causes
- Damaged/chafed harness to cylinder 2 injector
- Injector 2 internal failure (electrical or mechanical)
- Weak or missing injector supply voltage/ground
- Fuel pressure regulator or pump faults causing improper delivery
- PCM/ECM driver transistor failure
Fault status
Status
P020B — Cylinder 2 Injection Timing: PCM detected abnormal or missing injection timing/control for cylinder 2 indicating an injector circuit, timing, fuel delivery, or driver fault.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email